[GeoLib] Tests for GeoLib::computeIntersectionPoints().
[GeoLib] Impl. of computeAndInsertAllIntersectionPoints().
[GeoLib] Test for GeoLib::computeAndInsertAllIntersectionPoints().
[FileIO] Using GeoLib::computeAndInsertAllIntersectionPoints().
[MathLib] PETScMatrix style.
[GeoLib] Polygon test: isPolylineInPolygon().
[GeoLib::Polygon] getAllIntersectionPoints().
[GeoLib::Polygon] Impl. of containsSegment().

Method will be used later on to check if a polyline is within the polygon.
[GeoLib] Tests for Polygon::containsSegment().
md Removed computeIntersectionPoint().
[GeoLib::SimplePolygonTree] Using isPolylineInPolygon().

The until now implementation is not correct. Using
Polygon::isPolylineInPolygon(), which is tested already.