- remove and comment some gcc compiler warnings for not used vaiables.
The GTest framework has a more active support base, and natively supports CMake. Introduce it as an external dependency (using CMake's ExternalProject_Add), replacing cppunit and porting the associated unit tests.
Add unit test for this. Fix build errors due to invalid pch settings in vc9 | release-noboost. git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@798 67173fc5-114c-0410-ac8e-9d2fd5bffc1f