OO-1068 OO-1067 flexi form refactoring towards bootstrap, implement default layouts, further simplify DOM

OO-936: implements course element "check list", enhance the flexi-table with sort, filter and export, enhance publish process with an update step, upgrade pdfbox to version 1.84

OO-948: make the ContextEntryControllerCreator cloneable, a cloned creator can save request dependent informations between the calls of the different method to prevent multiple loading of the same resource, calculate severals time the permissions...

OO-932: upgrade Hibernate to 4.3, Infinispan to 6.0.1 , change the mapping of UserImpl (properties is a keyword) ...

OO-852: fix an issue with return files and the wizard, wording, german, english and french translations

OO-887: cache the usernames in UserManager, decouple the AvatarMapper and make it search the username in the cache.

OO-798, OO-797, OO-796: update the webdav implementation based on Tomcat, make OpenOLAt work under root context, small refactoring of the dispatchers, push raw files dispatcher to its own servlet, implements Digest authentication...

OO-809: fix the wrong equals for non-mysql database in findIdentiesByEmail (patch 1 of S. Clemenz), add unit tests

OO-744,OO-784: disable the co-author hidden feature, add a view of the roles in the user personal settings