New config app. Apps only have to define config vars once. Config pages, forms and so on are created automaticly.

Changes after some reviews are done.

Problematic is still that the JS can not be moved to an extra file because of the template tags in the code.
Merge pull request #573 from normanjaeckel/ConfigRebase1

New config app. Apps only have to define config vars once. Config pages,...
create speaker list model and some views
append user to list of speaker form
do not let the same speaker on the list of speakers twice
Let the user speak. Open/Close the speaker list
Slide for the list of speakers