Merge branch 'release/2.3.0' into develop

* release/2.3.0:
  * Bootstrap 3.0.2 * Updated gems
Merge branch 'hotfix/2.3.1' into develop

* hotfix/2.3.1:
  * Fixed update of gems
Merge branch 'hotfix/2.3.2' into develop

* hotfix/2.3.2:
  Fixed README [ci skip]
Merge branch 'hotfix/2.3.3' into develop

* hotfix/2.3.3:
  * Updated gems
Merge branch 'hotfix/2.3.4' into develop

* hotfix/2.3.4:
  * Updated gems * Added bullet initializer
Merge branch 'hotfix/2.3.5' into develop

* hotfix/2.3.5:
  Updated gems
Merge branch 'hotfix/2.3.6' into develop

* hotfix/2.3.6:
  * Deploy with ruby 2.0.0-p353 * Updated gems
Merge branch 'hotfix/2.3.7' into develop

* hotfix/2.3.7:
  * Updated gems
Merge branch 'hotfix/2.3.8' into develop

* hotfix/2.3.8:
  * Rails 3.2.16 * Updated gems
Merge branch 'hotfix/2.3.9' into develop

* hotfix/2.3.9:
  * Updated gems * Fixed homepage * Fixed readme
  Improved test environment and routes
* Bootstrap v3.0.3
* Respond.js 1.4.1
* Updated gems
Merge branch 'release/2.4.0'

* release/2.4.0:
  * Bootstrap v3.0.3 * Respond.js 1.4.1 * Updated gems