Revision: mark getRaw*() methods as deprecated

Revision: mark getRaw*() methods as deprecated

   Revision->getRawUser()
=> Revision->getUser( Revision::RAW )

   Revision->getRawUserText()
=> Revision->getUserText( Revision::RAW )

   Revision->getRawComment()
=> Revision->getComment( Revision::RAW )

The body of Revision->getRawUserText() has been moved
into Revision->getUserText().
Every usage has been replaced.

Change-Id: Ic6fbfbc0507dcf88072fcb2a2e2364ae1436dce7