Move include of stdint.h, add critical arrays, add btManifoldArray and add custom btBroadphasePairArray
Swig generated files
Split up rendering in the bullet tests
Add Camera#lookAt(Vector3), remove some tmp usage, add #rotate(Matrix4), #rotate(Quaternion) and #transfrom(Matrix4)
Change camera#rotate to work without another pull request
Add bullet FrustumCullingTest