Updated .travis.yaml to match build lifecycle description on travis' site.

.travis.yml

@@ -8,7 +8,10 @@ go:
   - 1.2
   - 1.3
 
-before_script:
+before_install:
+  - sudo apt-get update
+
+install:
   - sudo apt-get install -y libjna-java python-pip
   - sudo pip install cql PyYAML six
   - go get code.google.com/p/go.tools/cmd/vet