Log Message:
Update to 3.5.0.

Changes in 3.5.0
2015-08-15

- New things:
  - Voronoi API (#627)
  - PHP: Geometry->normalize method
  - GEOS_USE_ONLY_R_API macro support (#695)
  - PHP: WKBReader->read() & WKBWriter::write() methods (Benjamin Morel)
  - GEOSClipByRect (#699, Mika Heiskanen, Sandro Santilli)
  - CAPI: thread-safe message handling API (#663, Pepijn Van Eeckhoudt)
- Improvements:
  - Speed-up intersection and difference between geometries
    with small bounding box overlap.
  - CAPI: add MULTILINESTRING support for GEOSisClosed (Benjamin Morel)
- C++ API changes:
  - Added no-parameter CoordinateSequenceFactory::create method (Sandro Mani)