Change twitter/bootstrap version to 2.*

twitter/bootstrap: 2.0.* doesn't exist in packagist.
Merge pull request #444 from damour/v2.2.x

Change twitter/bootstrap version to 2.*
#355 fixed hardcoded __name__ prototype name (by @byhoratiss)
Merge pull request #464 from naitsirch/issue355

PR for #355: Collections inside Collections - JS problem
fallback to default icon_color in collection buttons
fallback to default icon_color in add-button
Merge pull request #472 from naitsirch/use_default_icon_color_v2.2.x

fallback to default icon_color in collection buttons
Removed wayward 'X' from code that was showing 'X is not defined' error in code.
Merge pull request #484 from gmoreira/v2.2.x

Removed wayward 'X' from code that was showing 'X is not defined' error
Update BootstrapSymlinkLessCommand.php

Bootstrap has moved to @twbs/bootstrap. This is already in the master branch, but we would need it in the v2.2.x branch aswell.
Update ScriptHandler.php

same here
Update composer.json

Bootstrap has moved to @twbs/bootstrap
Merge pull request #496 from Primajin/patch-2

Update ScriptHandler.php
Merge pull request #497 from Primajin/patch-4

Update composer.json
Update BootstrapSymlinkLessCommand.php

Bootstrap has moved to @twbs/bootstrap
Update composer.json

Bootstrap has moved to @twbs/bootstrap
Merge pull request #495 from Primajin/patch-1

Update BootstrapSymlinkLessCommand.php
Update mopabootstrapbundle.less related to the ScriptHandler.php update

- @import replace "bootstrap" by "twbs"
Update base.html.twig

Bootstrap has moved to @twbs/bootstrap
Update base_initializr.html.twig

Bootstrap has moved to @twbs/bootstrap