Changes in BitBake 1.8.x:
	- Psyco is available only for x86 - do not use it on other architectures.
	- Fix a bug in bb.decodeurl where http://some.where.com/somefile.tgz decoded to host="" (#1530)
	- Warn about malformed PREFERRED_PROVIDERS (#1072)
	- Add support for BB_NICE_LEVEL option (#1627)
	- Sort initial providers list by default preference (#1145, #2024)
	- Improve provider sorting so prefered versions have preference over latest versions (#768)
	- Detect builds of tasks with overlapping providers and warn (will become a fatal error) (#1359)
	- Add MULTI_PROVIDER_WHITELIST variable to allow known safe multiple providers to be listed
	- Handle paths in svn fetcher module parameter
	- Support the syntax "export VARIABLE"
	- Add bzr fetcher
	- Add support for cleaning directories before a task in the form:
	  do_taskname[cleandirs] = "dir"
	- bzr fetcher tweaks from Robert Schuster (#2913)
	- Add mercurial (hg) fetcher from Robert Schuster (#2913)
	- Fix bogus preferred_version return values
	- Fix 'depends' flag splitting
	- Fix unexport handling (#3135)
	- Add bb.copyfile function similar to bb.movefile (and improve movefile error reporting)
	- Allow multiple options for deptask flag
	- Use git-fetch instead of git-pull removing any need for merges when 
	  fetching (we don't care about the index). Fixes fetch errors.
	- Add BB_GENERATE_MIRROR_TARBALLS option, set to 0 to make git fetches 
	  faster at the expense of not creating mirror tarballs.
	- SRCREV handling updates, improvements and fixes from Poky
	- Add bb.utils.lockfile() and bb.utils.unlockfile() from Poky

Changes in Bitbake 1.8.8:
	- Rewrite svn fetcher to make adding extra operations easier 
	  as part of future SRCDATE="now" fixes
	  (requires new FETCHCMD_svn definition in bitbake.conf)
	- Change SVNDIR layout to be more unique (fixes #2644 and #2624)
	- Import persistent data store from trunk
	- Sync fetcher code with that in trunk, adding SRCREV support for svn
	- Add ConfigParsed Event after configuration parsing is complete
	- data.emit_var() - only call getVar if we need the variable
	- Stop generating the A variable (seems to be legacy code)
	- Make sure intertask depends get processed correcting in recursive depends
	- Add pn-PN to overrides when evaluating PREFERRED_VERSION
	- Improve the progress indicator by skipping tasks that have 
	  already run before starting the build rather than during it
	- Add profiling option (-P)
	- Add BB_SRCREV_POLICY variable (clear or cache) to control SRCREV cache
	- Add SRCREV_FORMAT support
	- Fix local fetcher's localpath return values
	- Apply OVERRIDES before performing immediate expansions
	- Allow the -b -e option combination to take regular expressions
	- Add plain message function to bb.msg
	- Sort the list of providers before processing so dependency problems are 
	  reproducible rather than effectively random
	- Add locking for fetchers so only one tries to fetch a given file at a given time
	- Fix int(0)/None confusion in runqueue.py which causes random gaps in dependency chains
	- Fix handling of variables with expansion in the name using _append/_prepend
	  e.g. RRECOMMENDS_${PN}_append_xyz = "abc"
	- Expand data in addtasks
 	- Print the list of missing DEPENDS,RDEPENDS for the "No buildable providers available for required...."
 	  error message.
	- Rework add_task to be more efficient (6% speedup, 7% number of function calls reduction)
	- Sort digraph output to make builds more reproducible
	- Split expandKeys into two for loops to benefit from the expand_cache (12% speedup)
	- runqueue.py: Fix idepends handling to avoid dependency errors
	- Clear the terminal TOSTOP flag if set (and warn the user)
	- Fix regression from r653 and make SRCDATE/CVSDATE work for packages again

Changes in Bitbake 1.8.6:
	- Correctly redirect stdin when forking
	- If parsing errors are found, exit, too many users miss the errors
	- Remove supriours PREFERRED_PROVIDER warnings

Changes in Bitbake 1.8.4:
	- Make sure __inherit_cache is updated before calling include() (from Michael Krelin)
	- Fix bug when target was in ASSUME_PROVIDED (#2236)
	- Raise ParseError for filenames with multiple underscores instead of infinitely looping (#2062)
	- Fix invalid regexp in BBMASK error handling (missing import) (#1124)
	- Don't run build sanity checks on incomplete builds
	- Promote certain warnings from debug to note 2 level
	- Update manual

Changes in Bitbake 1.8.2:
	- Catch truncated cache file errors
	- Add PE (Package Epoch) support from Philipp Zabel (pH5)
	- Add code to handle inter-task dependencies
	- Allow operations other than assignment on flag variables
	- Fix cache errors when generation dotGraphs

Changes in Bitbake 1.8.0:
	- Release 1.7.x as a stable series

Changes in BitBake 1.7.x:
	- Major updates of the dependency handling and execution
	  of tasks. Code from bin/bitbake replaced with runqueue.py
	  and taskdata.py
	- New task execution code supports multithreading with a simplistic
	  threading algorithm controlled by BB_NUMBER_THREADS
	- Change of the SVN Fetcher to keep the checkout around
	  courtsey of Paul Sokolovsky (#1367)
	- PATH fix to bbimage (#1108)
	- Allow debug domains to be specified on the commandline (-l)
	- Allow 'interactive' tasks
	- Logging message improvements
	- Drop now uneeded BUILD_ALL_DEPS variable
	- Add support for wildcards to -b option
	- Major overhaul of the fetchers making a large amount of code common
	  including mirroring code
	- Fetchers now touch md5 stamps upon access (to show activity)
	- Fix -f force option when used without -b (long standing bug)
	- Add expand_cache to data_cache.py, caching expanded data (speedup)
	- Allow version field in DEPENDS (ignored for now)
	- Add abort flag support to the shell
	- Make inherit fail if the class doesn't exist (#1478)
	- Fix data.emit_env() to expand keynames as well as values
	- Add ssh fetcher
	- Add perforce fetcher
	- Make PREFERRED_PROVIDER_foobar defaults to foobar if available
	- Share the parser's mtime_cache, reducing the number of stat syscalls
	- Compile all anonfuncs at once! 
	  *** Anonfuncs must now use common spacing format ***
	- Memorise the list of handlers in __BBHANDLERS and tasks in __BBTASKS
	  This removes 2 million function calls resulting in a 5-10% speedup
	- Add manpage
	- Update generateDotGraph to use taskData/runQueue improving accuracy
	  and also adding a task dependency graph
	- Fix/standardise on GPLv2 licence
	- Move most functionality from bin/bitbake to cooker.py and split into
	  separate funcitons
	- CVS fetcher: Added support for non-default port
	- Add BBINCLUDELOGS_LINES, the number of lines to read from any logfile
	- Drop shebangs from lib/bb scripts

Changes in Bitbake 1.6.0:
	- Better msg handling
	- COW dict implementation from Tim Ansell (mithro) leading
	  to better performance
	- Speed up of -s

Changes in Bitbake 1.4.4:
	- SRCDATE now handling courtsey Justin Patrin
	- #1017 fix to work with rm_work

Changes in BitBake 1.4.2:
	- Send logs to oe.pastebin.com instead of pastebin.com
	  fixes #856
	- Copy the internal bitbake data before building the
	  dependency graph. This fixes nano not having a
	  virtual/libc dependency
	- Allow multiple TARBALL_STASH entries
	- Cache, check if the directory exists before changing
	  into it
	- git speedup cloning by not doing a checkout
	- allow to have spaces in filenames (.conf, .bb, .bbclass)

Changes in BitBake 1.4.0:
	- Fix to check both RDEPENDS and RDEPENDS_${PN}
	- Fix a RDEPENDS parsing bug in utils:explode_deps()
	- Update git fetcher behaviour to match git changes
	- ASSUME_PROVIDED allowed to include runtime packages
	- git fetcher cleanup and efficency improvements
	- Change the format of the cache
	- Update usermanual to document the Fetchers
	- Major changes to caching with a new strategy
	  giving a major performance increase when reparsing
	  with few data changes

Changes in BitBake 1.3.3:
	- Create a new Fetcher module to ease the
	  development of new Fetchers.
	  Issue #438 fixed by rpurdie@openedhand.com
	- Make the Subversion fetcher honor the SRC Date
	  (CVSDATE).
	  Issue #555 fixed by chris@openedhand.com
	- Expand PREFERRED_PROVIDER properly
	  Issue #436 fixed by rprudie@openedhand.com
	- Typo fix for Issue #531 by Philipp Zabel for the
	  BitBake Shell
	- Introduce a new special variable SRCDATE as
	  a generic naming to replace CVSDATE.
	- Introduce a new keyword 'required'. In contrast
	  to 'include' parsing will fail if a to be included
	  file can not be found.
	- Remove hardcoding of the STAMP directory. Patch
	  courtsey pHilipp Zabel
	- Track the RDEPENDS of each package (rpurdie@openedhand.com)
	- Introduce BUILD_ALL_DEPS to build all RDEPENDS. E.g
	  this is used by the OpenEmbedded Meta Packages.
	  (rpurdie@openedhand.com).

Changes in BitBake 1.3.2:
	- reintegration of make.py into BitBake
	- bbread is gone, use bitbake -e
	- lots of shell updates and bugfixes
	- Introduction of the .= and =. operator
	- Sort variables, keys and groups in bitdoc
	- Fix regression in the handling of BBCOLLECTIONS
	- Update the bitbake usermanual

Changes in BitBake 1.3.0:
	- add bitbake interactive shell (bitbake -i)
	- refactor bitbake utility in OO style
	- kill default arguments in methods in the bb.data module
	- kill default arguments in methods in the bb.fetch module
	- the http/https/ftp fetcher will fail if the to be 
	  downloaded file was not found in DL_DIR (this is needed
	  to avoid unpacking the sourceforge mirror page)
	- Switch to a cow like data instance for persistent and non
	  persisting mode (called data_smart.py)
	- Changed the callback of bb.make.collect_bbfiles to carry
	  additional parameters
	- Drastically reduced the amount of needed RAM by not holding
	  each data instance in memory when using a cache/persistent
	  storage

Changes in BitBake 1.2.1:
	The 1.2.1 release is meant as a intermediate release to lay the
	ground for more radical changes. The most notable changes are:

	- Do not hardcode {}, use bb.data.init() instead if you want to
	  get a instance of a data class
	- bb.data.init() is a factory and the old bb.data methods are delegates
	- Do not use deepcopy use bb.data.createCopy() instead.
	- Removed default arguments in bb.fetch

