removed Julien's quick fix for RC. They should use DefaultAnnex for
thease whent here is no plug-in for an annex.
Fixed unparser to better handle unparsing with default unparser or
registered unparser.
Default unparser is returned when no registered unparser for the
specific annex exists.
Default annex unparser handles unparsing of special annexes when no
unparser is registered by just unparsing the default text.
cleaned up AnnexUtil
removed AnnexSource and its impl.
regenerated from xtext. No real change to grammar
Marked the methods Julien added to support basic text as deprecated.
Handling of annex text is already accomplished by DefaultAnnexSubclause
and DefaultAnnexLibrary.
localized the offset calculation for annex text.
Changed interface to parser to include {** **} in annextext instead of
stripping and compensating in a number of places.
added back in stripping out of {** and **}
Compensate for stripping {** in getOffset