[geos-devel] CoordSeq ADT and fine-grained ctors for C-API (was: GEOS C API Suggestions)

[strk at refractions.net]

I've committed support for GEOSCoordSeq abstract data type,
fine-grained construction and inspection.

The geostest binary contains testing for it (deconsctruction
and re-construction of input geometry).

All extractors and constructors perform object copies.

The GEOSmakeCollection function has been renamed to
GEOSGeom_createCollection (to conform with other constructors).

See geos_c.h for new function signatures.

Comments welcome.

--strk;