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

[EliasJRH]

One approach could be to use pythons csv.DictWriter class. Since we know that each timestamp will receive a single reading for each sensor, we can have each timestamp be a key in the dictionary and store the values there

https://docs.python.org/3/library/csv.html#csv.DictWriter