New functionality on the TextureManager: loading textures and generating a random id.
More resources: Adding cally model.
Updating gitignore.
Upgrading to c++ 11.
Splitting Cal Models into 'Meshes' and 'Models'. Implemeting authomatic calling and other minor details.
Removing unnecessary ParticleSystem files.
Updating the PhysicalMotor2D and removing unnecessary ParticleSystem files.
Removing unnecessary virtual modifier from some functions in PartycleSystem2D.