[postgis-devel] new loader supports: TypeM, TypeZ 4d

[strk at refractions.net]

I've finished the work on loader/dumper.
Finally the loader is in a readable state.

Changes are:
	o dumper works with LWGEOM and HWGEOM
	o loader works with LWGEOM only
	o TypeZ is loaded as GEOM4D - use force_3dz to save M space
	o TypeM is loaded as GEOM3DM - use force_4d to make space for Z
	o GEOM4D is dumped as TypeZ
	o GEOM3DM is dumped as TypeM
	o GEOM3DZ is dumped as TypeZ - let ESRI trash your disk...

--strk;