This is a basic translational and rotational simulation tool with RK4 integrator. It uses a single engined liquid engine (for now) and includes mass depletion dynamics. This uses Modified Rodrigues Parameter as the attitude formalism, with dynamics expressed in them.

-[x] add atmospheric drag
-[] add attitude dependant drag / lift
-[] add EKF law with sensors
-[] add general cold gas thruster sim
-[] add TVC controller