Coupled assignment candidates with list of speakers. Fixed #1092.
Rename and clean up static direcories.

- rename static subdirs to css and js
- move global static dir to core/static, changed
- move global templates dir to core/templates
- check comments and code style of all our own CSS and JS files
- minor changes related to the changes of template and static files
Merge pull request #1182 from normanjaeckel/CoupleAssignmentListOfSpeakers

Coupled assignment candidates with list of speakers. Fixed #1092.
Merge pull request #1193 from emanuelschuetze/rename-static-files

Rename and clean up static directories.
removed duplicated entry from the README.rst

See #1189
Merge pull request #1194 from ostcar/jsonfield

removed duplicated entry from the README.rst
Fixed #1190: Wrong sorting of motion identifier

- Added natural sorting JS plugin for motion DataTables (column identifier).
- Added the new requirements python package 'natsort' for natural sorting of motions in PDF.
Merge pull request #1192 from emanuelschuetze/naturalsort

Fixed #1190: Wrong sorting of motion identifier
Fixed #1195: Correct path to circle.png on ballot paper (assignment and motion).
Fixed #1138: Wrong file for projectors logo
Move projector.models.ProjectorSlide to core.models.CustomSlide
Merge pull request #1207 from emanuelschuetze/fix-1138

Fixed #1138: Wrong file for projectors logo
Fixed #1177 and #1209: Added new requirments for portable: setuptools (pkg_resources) and jsonfield.
Merge pull request #1196 from emanuelschuetze/fix-1195

Fixed #1195: Correct path to circle.png on ballot paper (assignment and ...
Merge pull request #1208 from ostcar/customslide

Move projector.models.ProjectorSlide to core.models.CustomSlide
Reinserted icon and link for preview of agenda slide. Fixed #1199.
Inserted command line option to translate config strings during database setup. Fixed #460.
Merge pull request #1212 from normanjaeckel/ConfigTrans

Inserted command line option to translate config strings during database...
Merge pull request #1211 from normanjaeckel/PreviewAgenda

Reinserted icon and link for preview of agenda slide. Fixed #1199.
fix for python2.6 and pip 1.5