Added translation and scaling to multiple selected objects at the same time

Added a draw entity to lights constructor so they can be selected using
the editor (the raycast returns a pointer to the light).
Added set properties to the material class like setambientcolor().
Using previous new functions the mesh importer has being modify to use
them.
Added the posibility to make rigidbody with no physics (no collisions).
Changed movableObjects types enum constants to upper case.