0.7.0

this change includes patches and bugfixes to pass the reassessment

changelog:
- added TARQ command to set target area
- fixed timers on robot (now more accurate and actually working)
- added battery level and millivolts to INFO command
- take average of multiple measurements for battery status
- fix buffer overrun on client
- display battery percentage instead of voltage in client
- fix order receiving (BOMD command)
- execute sent orders instead of hard-coded ones
- added keybinds for setting target area in client
- spell/fact check readme and protocol spec (document)
- added status display to robot lcd
- added beeps for errors and warnings on robot
- added override set_motors function to allow object detection to stop
  the robot
- fix brainfart in modes.c that caused mode buffer iob on every mode
  switch
- updated simulation robot code to compile (no simulated sensor data)
- fixed parenthesis order _BYTE_N macros in bin.c
- added order arrived info message