Build all branches on travis

We should build all branches for travis, otherwise users won't be able to test
their own feature branches.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge branch 'update_travis'

* update_travis:
  Build all branches on travis
  Enable puppet 3.0.1 in travis.yml
Standardize travis and gemfile

This commit standardizes the travis and gemfile to be similar
to the files in stdlib.