OO-449 OO-448 OO-450 fixing configuration issues and dependencies in IM module, adding context help and translations, some GUI optimizations

OO-562: fix the difference between the profile editor and the home page about the visibility of mandatory attributes

OO-449: with the whole caching refactoring, make the HTTP session partially serializable without (too much) exceptions

OO-449: move from ehcache to infinispan to have access to a distributed cache in a cluster environment, fix some issues with a cluster environment

no-jira: fix a unit test which fail randomly because Grizzly change its HtppSession during processing the request

OO-460: make the spring xml configuration easier to configure with the profile function of spring 3.1

OO-457: refactor tmp folder in OpenOLAT, use the java.io.tmpdir for all temporary files, configuration for absolute path for the indexer, fix deletion of temporary files in some archives, move qtieditor from tmp

OO-449: refactor user session to work with identity key, make it pop, implements one to one chat, group chat, course chat, remove connect user list, refactor UserRequest to make it an interface

OO-449: first part of the implementation: remove smack libraries, refactor controller and unify them, implements messaging across the OpenOLAT event bus, implements administration part to enable chat...

OO-271: refactor the user session management, move the the logic in its own manager, persist the time out values, make the admin GUI a bit better

OO-406: implements the skeleton for the OpenMeetings rooms, course building blocks, group tools, connection via SOAP to OpenMeetings...

OO-377: implements pending state or reservation for groups and repository entry access to participants

no-jira: fix documentation of REST API, fix wrong path of the LogWebService, backport RegistrationWebService to OpenOLAT with its unit tests