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.
Merge pull request #694 from emanuelschuetze/translations

For transifex: Added en po files  and updated en and fr po files