Cache bundler dependencies
Keep track of last response.
Merge pull request #15 from code42/add-travis-bundle-cache

Cache bundler dependencies
Merge pull request #16 from ncolgan/keep_last_response

Keep track of last response.
Merge branch 'master' of github.com:code42/code42_api_ruby into as-request-instrumentation

Conflicts:
	lib/code42/connection.rb