Added disturbance forces and torques and dummy control inputs

If you want to use disturbance forces and torques, set the configuration parameter 'useDisturbanceForcesAndTorques' to true. They are added to the aero forces and torques.

If you wish to do MHE with these disturbances, it is not possible, because the IMU_acceleration measurement function depends on these forces (and you cannot depend on both states and controls).
Therefore, I added 3 dummy control inputs u_a1, u_a2 and u_a3. Enable them by setting 'useDummyAccelerationControls' to true. Now you can do a trick:

In stead of doing:

minize norm( h(x,u)-y )

which is not allowed, you can do in stead

minimuze norm( u_a )
subject to h(x,u) - u_a == 0

which is allowed.
renamed dummy controls to dummyAcceleration_1, ..
Added disturbance forces and torques

And also the dummy control inputs