Hefty commit, largely due to adding all include and libs locally until I feel like making a build scheme. Also some functionality changes, see below.

* Changed Drawable class to Mesh class and added more meaningful functionality
    - Now contains vectors for vertices, normals and elements.
    - You can now pass a mesh to obj loader to load a .obj file.
* Added a second paddle, WASD controls the closer one and the arrows control the further one