Merge branch 'release/2.5.0' into develop

* release/2.5.0:
  * Bootstrap 3.0.2 @ [463343af63](https://github.com/twbs/bootstrap/tree/463343af63344dbbc3db04f40b0b804baa919b7e)
Merge branch 'hotfix/2.5.1' into develop

* hotfix/2.5.1:
  * Rails 4.0.2 * Rails 3.2.16
* Bootstrap v3.0.3
* Respond.js 1.4.1
* Submodules locked to tags instead of master branch
Merge branch 'release/2.6.0'

* release/2.6.0:
  * Bootstrap v3.0.3 * Respond.js 1.4.1 * Submodules locked to tags instead of master branch