added some SIMPLE FEATURES API of geos::Geometry to Python API and test.py

isSimple(), within(geom), contains(geom), disjoint(geom), touches(geom), intersects(geom), crosses(geom), overlaps(geom), equals(geom), covers(geom), coveredBy(geom), relate(geom, "T*T***T**"), distance() ,getArea() ,getLength() , isWithinDistance(geom, 0)