ObjLoader now returns the number of indices, which will be used by the associated Mesh.
Mesh now properly takes into account number of vertices if they are loaded from an obj.
Updated vertex descriptions and created a cube from our obj file.
Added our cube .obj file as as text file. Updated loading of file with new file extension (used to be .OBJ).

We will be saving our .obj files as .txt. files from now on because Visual Studio has its own .OBJ file that we want to ignore.
Merge branch 'master' of https://github.com/Eniripsa96/3DTetris