documentation: Changed all manual links to point to "latest"

There are many references to YP documentation throughout the
YP manual set.  They used to have hard-coded links to the
current release (e.g. yoctoproject.org/docs/1.1 for Edison).
This created a situation where if you went to a document on
the website and clicked on a external reference to another
manual, you would redirect to the current manual on the website.
Really, you would want to go to the latest manual, which is
one that is under development.  Changing the links to
"yoctoproject.org/docs/latest" makes the tip of master, which
is used for devloping the next release, always have references
to the manuals being developed and not back to the stable
released set of manuals.

This "latest" and "current" scheme for the links is not perfect.
What has to happen when the latest set of the manuals freezes
and becomes the next stable release, all the links in the docs
will need to be changed from "latest" in the URL to the new
release number.  So for example, all the "latest" occurences
would need to be changed to "1.2".  Then for the next cycle
as development begins again, the links need to be infused with
"latest" again.

(From yocto-docs rev: a234aef34303b07671da956de0e94b352797143e)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/bsp-guide/bsp-guide.xml

@@ -70,7 +70,7 @@
       <note>
           Due to production processes, there could be differences between the Yocto Project
           documentation bundled in the release tarball and the 
-          <ulink url='http://www.yoctoproject.org/docs/1.1/bsp-guide/bsp-guide.html'>
+          <ulink url='http://www.yoctoproject.org/docs/latest/bsp-guide/bsp-guide.html'>
           Board Support Package (BSP) Developer's Guide</ulink> on
           the <ulink url='http://www.yoctoproject.org'>Yocto Project</ulink> website.
           For the latest version of this manual, see the manual on the website.