Add WKBReader::read() & WKBWriter::write() PHP bindings

Includes tests.
Patch by Benjamin Morel <benjamin.morel@gmail.com>

Signed-off-by: Sandro Santilli <strk@keybit.net>

git-svn-id: http://svn.osgeo.org/geos/trunk@4015 5242fede-7e19-0410-aef8-94bd7d2200fb
Import work-in-progress for a fast rectangle intersection op
Setup build scripts for new intersection op, fix some build issues

Lots to do yet!
Use GeometryFactory::buildGeometry from RectangleIntersectionBuilder

also move documentation from .cpp to .h file
Import draft unit test for itnersection op
Use RectangleIntersects predicate from RectangleIntersection
intersection operation fully builds now

.. moving on to tests
Enable some of RectangleIntersection tests

10 failures over 50 so far
Enable more tests, avoiding the "toxic" ones

toxic ones are those that seem to enter an infinite loop
Fix leftover bugs, all existing testcases now pass
Plug memory leak in rectangle intersection