Reworked response viewlet:

 - complete new look.
 - introduce ResponseDescription.
 - moved viewlet to viewlets directory
Change response init.
Add action menu viewlet.
Fixed Bug in transitioncontroller.

 - wrong name of task.method and add missing import.
Response progress: show entry for the task creation.
Response_description: Update some css_classes.
Added comment for refactoring which should be done in the future.
Response description: added missing descriptions.
Added german translations for the respone descriptions.

French translations are missing and should be updated later.
Change viewlet order.
Move viewlet manager to its own module.
Add simple tests for task history/response viewlets.
Merge pull request #346 from 4teamwork/deif-actions-viewlet

Add Github-Style Task History