Switch to Travis CI new build infra.

.travis.yml

@@ -1,3 +1,5 @@
+sudo: false
+
 language: go
 
 go:
@@ -6,28 +8,30 @@ go:
   - 1.5
   - tip
 
+addons:
+  apt:
+    packages:
+    - python-virtualenv
+    - graphviz
+
 env:
   global:
     - secure: "YSwtFrMqh4oUvdSQTXBXMHHLWeQgyNEL23ChIZwU0nuDGIcQZ65kipu0PzefedtUbK4ieC065YCUi4UDDh6gPotB/Wu1pnYg3dyQ7rFvhaVYAAUEpajAdXZhlx+7+J8a4FZMeC/kqiahxoRgLbthF9019ouIqhGB9zHKI6/yZwc="
     - secure: "V7OjWrfQ8UbktgT036jYQPb/7GJT3Ol9LObDr8FYlzsQ+F1uj2wLac6ePuxcOS4FwWOJinWGM1h+JiFkbxbyFqfRNJ0jj0O2p93QyDojxFVOn1mXqqvV66KFqAWR2Vzkny/gDvj8LTvdB1cgAIm2FNOkQc6E1BFnyWS2sN9ea5E="
     - secure: "OxiVNmre2JzUszwPNNilKDgIqtfX2gnRSsVz6nuySB1uO2yQsOQmKWJ9cVYgH2IB5H8eWXKOhexcSE28kz6TPLRuEcU9fnqKY3uEkdwm7rJfz9lf+7C4bJEUdA1OIzJppjnWUiXxD7CEPL1DlnMZM24eDQYqa/4WKACAgkK53gE="
 before_install:
-  - sudo apt-get update -qq
-  - sudo apt-get install -y python-virtualenv graphviz
   - virtualenv env
   - . env/bin/activate
   - pip install boto requests python-swiftclient
 install:
   - make prepare
 
-
 script: make travis
 
 matrix:
     allow_failures:
         - go: tip
 
-
 notifications:
   webhooks:
     urls: