Added assets section to Gemfile
Added haml-rails gem
Removed combined development test group from Gemfile
Removed unneeded entry from Gemfile
Removed uneeded comment
Revert "Removed unneeded entry from Gemfile"

This reverts commit 1c8adad51bcb6dbcf0d98d6dd8e072c6483cf6ab.
Don't require travis-lint in Gemfile
Merge pull request #27 from obduk/cleanup_gemfile

Cleanup gemfile