Merge branch 'hotfix/1.0.1' into develop

* hotfix/1.0.1:
  * Tested against Rails 3.2.20, 4.0.11 and 4.1.7
removed Rails 3.2 compatibility
Updated ruby version in travis.yml
bootstrap-sass 3.3.1
fixed readme
Merge branch 'release/2.0.0'

* release/2.0.0:
  fixed readme
  bootstrap-sass 3.3.1
  Updated ruby version in travis.yml
  removed Rails 3.2 compatibility