Protocol packet counting

See merge request hev-sw/hev-sw!58

# Conflicts:
#   arduino/common/lib/CommsControl/CommsCommon.h
#   arduino/hev_prototype_v1/src/common.h
#   raspberry-dataserver/CommsCommon.py

- added counting of dropped packets sent/received
- duration of main loop on average and max duration

Battery uc

See merge request hev-sw/hev-sw!57

- safety checks on continuous packet mismatch
- lowered all sending timeouts to 5 ms
- better ACK/NACK propagation

Added custom tool tips to loop plot for review of each point (only works well when loop stopped)

Closes hev-display#8

See merge request hev-sw/hev-sw!56