merged all the fixes from master
added notes for 2.2.3
Setting version to 2.2.3
removed the deprecated given when then page
created the notes file for 2.3
merged with the 2.2.3 branch
fixed the failing specification after merge
finished the notes
adjusted the user guide
small adjustments to the index file
Setting version to 2.3
Setting version to 2.4-SNAPSHOT