Adding README with instructions how to obtain recorded angle values.

Author: aentinger

examples/Braccio_Record_and_Replay/README.md

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+`Braccio_Record_and_Replay`
+===========================
+For debug purposes all recorded angles can be received via serial command. The approach to do this is:
+* Start `minicom`.
+```bash
+minicom -D /dev/ttyACM0  -C angle_log.csv
+```
+* Press `Record` and record some angles.
+* Retrieve the recorded angles by sending `r` (Press `r`). You'll see the output on your console which will automagically be stored in the CSV file.
+* Close `minicom` with `Ctrl + A`, `Ctrl + Q`.