OO-2429: move the foreign key from identity to user, remove double mapping of identity, add more unit tests for invitation, unify the methods to create the user and identity

OO-2354: decouple attribute sued to search a user on the LDAP server from the user identifier and make it configurable, add embbeded LDAP server for unit tests

OO-2172: refactor the spring configuration to be more Spring 4 friendly, remove the cycle generate by the properties injection, deployment of course and user in a separate module

no-jira: fix some unicode characters, better length check in velocity template, add some infos for user properties context

OO-2241: remove optimized getter access to user properties, remove stupid unit test, change unit tests with the !keePEmail option

OO-2057: add more panels in home with dummy contents, add file storage, add poster for binder and page...

OO-1593: convert hint from QTI 1.2, handle disabled math extension, better behavior of the dropdown tree in assessment tool...