Fixed css problems that prevented the document content from being visible while and after editing if the content got too long for the editor area.

LL-203 #resolve
LL-204 #resolve
Limited document discussion to a max-height.
Added modal backdrop when searchmode is active.
Added summernote editor and font-awesome.
Made summernote modals compatible.
Successfully integrated summernote.
Adjusted summernote editor height.
Removed bootstrap wysiwyg.
discussion title has now an ellipsis if it is too long.
Updated available summernote options.
Removed the need for that in document content controller.
Removed the need for that in document content model.
Removed the need for that in document content service.
Removed the need for that in document discussions.
Removed the need for that in document module.
Changed login module to coffeescript.
Updated coffeescript files, removed that.
Updated license information of javascript files.
Updated license information of coffeescript files.
Transformed app.spec.js to a coffeescript file.
Css changes for modal dialogs.