Fix start script help text.
Merge pull request #1117 from normanjaeckel/StartScriptFix

Fix start script help text.
Fixed countdown and projector update issues

* agenda_item.get_absolute_url('projector') returns the activate-url of the related slide.
* agenda_item.is_activate() returns True, if the related item is active
* Fixed set_active_slide to accept kwargs
* Reset countdown when saving a new duration time
* Update countdown overlay when begin_speak and end_speak is called
* Fixed blinking countdown

Fixes: #1078, #1076, #1075
Merge pull request #1115 from ostcar/projector

Fixed countdown and projector update issues
Show friendly error message when portable dir is not writable (closes #1110)
Merge pull request #1122 from andkit/fix-1110

Fix for issue #1110
Final update of all languages for 1.5: CS, DE, FR, PT.
Merge pull request #1124 from emanuelschuetze/translations

Final update of all languages for 1.5: CS, DE, FR, PT.
translate lanuage names in global_settings

Fixes: #1118
Merge pull request #1119 from ostcar/translate_languages

translate lanuage names in global_settings