[MetaCRS] Update of EPSG database to v8.4

[Even Rouault]

Hi,

I've followed the update process of the EPSG SRS database to latest v8.4, and 
just committed the updated files into libgeotiff, GDAL and PROJ trunk. Also 
submitted to PostGIS.

From what I can see, among many changes and additions, 2 new projection 
methods have been added:
* 1051,Lambert Conic Conformal (2SP Michigan)
--> looks very close to standard "Lambert Conic Conformal (2SP)", with the 
addition of a new parameter K, the ellipsoid scaling factor.
* 1052,Colombia Urban

I don't think any of those 2 new methods are currently handled by PROJ, so the 
new PCS based on those projection methods (3 Michigan SRS, and several dozains 
of Colombia PCS) will not be handled by GDAL nor PROJ.

Regarding GDAL, I've improved the add_esri_column.py script (see 
http://trac.osgeo.org/geotiff/changeset/2446), so that we have more ESRI DATUM 
names. That should make morphing from/to ESRI .prj files a bit better.

Regarding PROJ.4 'espg' and PostGIS spatial_ref_sys.sql files, I've also added 
the list of SRS that are GEOCCS (GeoCentric) and COMPD_CS (Compound Horizontal 
+ Vertical).

Please let me know if you see issues.

libgeotiff:
http://trac.osgeo.org/geotiff/ticket/63
http://trac.osgeo.org/geotiff/changeset/2447

GDAL:
http://trac.osgeo.org/gdal/ticket/5462
http://trac.osgeo.org/gdal/changeset/27322

PROJ:
http://trac.osgeo.org/proj/ticket/236
http://trac.osgeo.org/proj/changeset/2448

Submitted for PostGIS :
http://trac.osgeo.org/postgis/ticket/2737

Best regards,

Even

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