PLY Parser now able to read how many vertices and faces a model has

~Change: Ply-parser also able to recognize end of header.
~Change: Tests for several ply-models (ON MY MACHINE!)
Merge branch 'fastkdtree-SS13-group1' of https://github.com/happah-graphics/happah into fastkdtree

Conflicts:
	happah/testmain.cpp