Added sensorMacAddress to csv-filename (to distinguish between the two crutches while measuring at the same time)

No constant values for gyro X, Y, Z anymore.

+ The csv content is structured.
+ Data is saved to the csv during runtime, not only at the end anymore.
+ List with sensor data in a buffer, everytime the data is stored to csv, the buffer is cleared.
+ Stop the script by pressing e.g. Ctrl+C (added try../except KeyboardInterrupt).

-The script will run once, after which the system needs to be switched off/on again.
- Accelerometer data incorrect, always constant value (x, y, z are all 501.9531)

fixed read of negative values
added csv to git ignore

updated the ReadMe file

streams aquisitionDuration from hardcoded MAC address

byte signing is not correct, negative values are interpreted incorrect.