Use btn-mini class for list of speakers question in agenda view.
Added wxpython license file. (Fixed #1109)
Template fixes

- Agenda overview: Fixed padding of duration column.
- Agenda overview: Optimize header information for small devices with bootstrap's row-fluid class.
- Fixed text align in assignment detail template.
Merge pull request #1112 from emanuelschuetze/template-fix

Minor template fix
Merge pull request #1113 from emanuelschuetze/wxpython

Wxpython license file (fixes #1109)
Merge pull request #1116 from emanuelschuetze/template-fix2

Minor template fixes
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