Added CSV import, fixed #1186. Also cleaned up motion and user CSV import.
Merge pull request #1226 from normanjaeckel/AgendaImport

Added CSV import, fixed #1186.
Simplify overlay api methods.
New projector view with the current list of speakers.
Merge pull request #1243 from normanjaeckel/ListOfSpeakersView

New projector view with the current list of speakers.
countdown shortcuts
Merge pull request #1230 from ostcar/countdown

Countdown shortcuts
Fixed #1197: Use big heading for custom slides without text.

Keep last projector scale/scroll values after activate new slide.
Added global chatbox for managers.
Improved chatbox style. Updated jquery cookie and jquery ui.

- Fixed js error on dashboard page if no cookie is found.
- Use cookies only until end of session. For dashboard cookies use url /dashboard only.
- Updated permission numbering of builtin groups and added can_use_chat permission.
- Used minified version of jquery.cookie.
- Added TODO comment for django session way from pull request.
Merge pull request #1220 from emanuelschuetze/chatbox

Chatbox (Fixed #504)
Merge pull request #1221 from emanuelschuetze/fix-1197

Fixed #1197: Use big heading for custom slides without text.
New poll slides for motion and assignment. (Fixed #862)

Move result table from assignment slide to assignment poll slide.