Status of current work: Geodetic objects and WKT 2 formatting

[Martin Desruisseaux <ma...@geomatys.com>]

Hello all

All Coordinate Reference System (CRS), Coordinate System (CS) and Datum
implementations have been ported to Apache SIS. Well Known Text (WKT)
version 1 and 2 formatting has been implemented for all those objects
and GML support is partially implemented. Consequently the following
packages should now be complete:

* org.apache.sis.referencing.crs (except GML support)
* org.apache.sis.referencing.cs
* org.apache.sis.referencing.datum

Work on WKT 1 and 2 parser will begin soon. Once the WKT parser has been
ported, the plan is:

* Port some of the remaining projections
* Port datum shift methods
* Port the EPSG authority factory
* More tests, in particular the GIGS tests on GeoAPI side

After that, the "sis-referencing" module would be about completed. But
we could consider a SIS 0.6 release before "sis-referencing" completion
if peoples wish (but I think that we need to complete at least WKT
parsing and GML first).

    Martin