OO-386: modifications for postgres (I would prefer inner join for all security groups and resources)

OO-386: remove the async executor of the repository manager and replace it with a evict from cache, select for update, merge process

no-jira: make a test in GroupMgmtTest reliable, fix some tests for Oracle, fix invisible NPE in Portal

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

OO-266: fix double redirect on the same request/output stream of tomcat if login in blocked with Shibboleth

OO-379: hold always the selected entry in the search with the table model hold by the table controller

OO-354: include first step to support oracle, openolat can be started, administrator can log in, update script from 8.1 to 8.2... (EXPERIMENTAL)

OO-272 OO-371 svg loader with alpha transparency (thanks stephan clemenz), use modernizr to detect browser features to better support IE7/8

OO-372,OO-96: implements mappers which can be persisted on the database, implements the infrastructure, implements the scorm mapper and the file mapper for iframe to be serializable/deserializable,

OO-373: made the notifications manager robust under concurrent access, write more unit tests to tests the queries on the database and test it under concurrent load