[TASK] Enable bundler caching in .travis.yml
[TASK] Enable bundler caching in .travis.yml

universsky/sass-rails,rails/sass-rails,glebtv/sass-rails,Andreis13/sass-rails,jcpetkovich/sass-rails,eileencodes/sass-rails,tshotoku/sass-rails,maclover7/sass-rails,ipmobiletech/sass-rails