* Added virtual qualifier to a few destructors in subclasses.
* Removed a few empty destructors that didn't need to be explicitly defined.
* Fixed a few typos
* Removed unnecessary empty virtual destructors in some classes with parent's who derrived from a class with a virtual destructor
- added rcFixupAdjacentContours which adjust adjacent contour sets so that that they share all vertices (still buggy!)
- changed the demo stucture to handle tiled navmesh generation process (still ugly)
- the performance results are put into a struct instead of logged immediatelly
- added ChunkyTriMesh class which allows to partiotion a trimesh to smaller pieces using AABB tree