Improved list of applications + support for app-buttons

- Support for Mock and Openstack
- Improved all states from vizual side
- Added icons and styling for app-buttons (run, restart, pause, stop,
  delete)
- Improved toggle on provider application
- All in respect with basics for responsive webdesign
Updated gettext translations
added start/stop/pause actions
added button styles for start/stop/pause
added support for pause/start/stop actions
added mock support for start/stop/pause
updated views for provider_application buttons
added start/stop/pause routes for provider_applications
updated dictionaries to add text for start/stop/pause
merged with #202
added available_actions for provider_applications; based controls based on it
added custom available_actions method for mock provider
Merge pull request #204 from jcoufal/applications_ux_enhancements

 Improved list of applications + support for app-buttons
changes to merge with #204
Merge remote-tracking branch 'upstream/master'
Merge pull request #206 from tzumainn/master

Add stop/pause/start actions for provider applications; implement for mock provider; unify provider application controls