- fixed headband interface
- updated accel interface
- fixed sonar conversion

Signed-off-by: Sean Cardello <seanmc602@gmail.com>
Merge branch 'master' of git@github.com:mcm101/HallwayNavApp.git

* 'master' of git@github.com:mcm101/HallwayNavApp.git:
  distance filtering
  commented some stuff for what I'd like to do

Conflicts:
	HallwayNavApp.ino
	sonar.ino

Signed-off-by: Sean Cardello <seanmc602@gmail.com>