[postgis-devel] LWGEOM: proj support

[strk at refractions.net]

I've added proj (transform) support to LWGEOM.

Current implementation does less memory copies then
the corresponding HWGEOM (GEOMETRY) one (modifies input
goemetry), but makes more proj lib calls (one for each point).
I did make no benchmarks, anyone testing please report 
speed comparison...

As a side-effect I've added a 'char *getPoint(POINTARRAY *, int )'
function to get a reference to internal storage of a POINTARRAY.

--strk;