Bugfixing, template improvements, translation updates.

- Fixed #649: Clean old motion fragments in template and pdf (about motion notes).
- Fixed motion pdf issues: missing submitters, voting result and make motion state translateable- Added post_save function also for UserUpdateView.
Fixed #680 (Open all PDFs in new tab).
Motion import improved:
- add semicolon support (use utils/csv_ext.py as participant import)
- show all warnings of each line in one warning message
- show success message with total counter (x of n motions imported).
- improved warning and error strings
Fixed #574: Changed DOCTYPE to HTML5 (for base.html and base-projector.html).
Fixed #431: Template improvements (removed unused loaded tags and check of all html template files)
Merge pull request #684 from emanuelschuetze/fixes-for-1.4b2

Fixes for 1.4b2
Fixed #683
Merge pull request #686 from normanjaeckel/Fix_Agenda

Fixed #683
Validator for agenda_start_time aded. PEP8 issue 'missing whitespace after ','' resolved
Insert test to the fix of #677
Merge pull request #685 from normanjaeckel/Issue_677

Validator for agenda_start_time aded.
Fixed #687
Fix #679
Merge pull request #689 from normanjaeckel/FixAccountWidget

Fixed #687
Merge pull request #690 from normanjaeckel/DeleteFeatureRejectVersion

Fix #679
Add tests for the list of speakers global links. Add end_speach link on the list of speakers widget.
Merge pull request #688 from normanjaeckel/Speaker_Widget_Improvement

Add tests for the list of speakers global links. Add end_speach link on ...
Fixed #682 Error if a group was added to a list of speakers
Merge pull request #691 from ostcar/issue-682

Fixed #682 Error if a group was added to a list of speakers
Added en po files  and updated en and fr po files (makemessages only) for transifex.