Outfactored CRS transformation aspect from GeometryClipper. Code cleanup.
GeometryClipper#clipGeometry() should return null if geometry is distinct to viewport. Added tests ensure and document behaviour.
Added checks for NULL render geometries in Java2DTextRenderer
Merge pull request #301 from occamlabs/3.4-fix-renderer-clipping

Fix for deegree-tracker #621: WMS: Rendering of stroked polygon does not finish