Depend on Rails 3 if ruby version is lower then 1.9.3
Test more rubies
Use later version of rails for ruby version 1.9.2
Fix: undefined method `gsub' for #<Pathname:/home/travis/build/jhnvz/retina_rails/public>
Update .travis.yml
Add extra config for Rails 4
Update README.md
Update README.me
Update README.md
Don't support Rails 4 for now
Better to read manifest loading
Merge pull request #37 from jhnvz/fix/specs

Fix specs and test more rubies
Fix: undefined method `gsub!` for nil:NilClass