[geos-devel] WKBReader bug fix, C-API updates

[strk at refractions.net]

I've fixed a bug in the WKBReader code prematurely
destroying the GeometryFactory used in output construction.
The interface has also been reduced to *require* a GeometryFactory
reference in input.

The C-API now contains version informations (see the geos_c.h file)
and a new function to construct Collection from array of Geometries.

I've been testing the C-API by implementing a postgis interface
to it, and it seems to be working fine.

--strk;