Merge branch 'hotfix/2.8.1'

* hotfix/2.8.1:
  * Fixed gem version number
Merge branch 'develop' of github.com:diowa/twbs_less_rails into develop

* 'develop' of github.com:diowa/twbs_less_rails:
* Improved tests
Merge branch 'hotfix/2.8.2' into develop

* hotfix/2.8.2:
  * Improved tests