Add plaintext to recorded sensor data

[EliasJRH]

We current implement recording of data by writing raw bytes to a .dump file. This could still be useful in some circumstances but we should also log parsed human readable sensor data to some csv file that propulsion can later export to excel.

One possible format could be

timestamp,p1,p2,..,p4,t1,..,t4,tm,et,qd,fv,ig,xv1,...,xv12
0,x,,x,x,,x,x,x,open,open,close