Satellite state improvements

[mee5-pdx]

Depending on the type of simulation, different states are needed.

Orbit state:

• time
• position
• velocity

Attitude state

• quaternion orientation
• euler rotation rates

These states might be better if they were tracked by the actuator object. It depend. Actuator states

• magnetorquer current
• reaction wheel velocity

[mee5-pdx]

Overall the current states as defined in the dynamics.py module need to be cleaned up