log the device's name in headers
collect #defines that alter functionality in reckonMe-Prefix.pch
obey the "exchange positions" setting (instead of being always on)
improve readability of sound detection messages in lock-screen
extend separation of sender and receive roles in order to convey the intents and minimize possible side-effects
fix issue that no PDR takes place if "exchange positions" is disabled (introduced in SHA: 230354e57a0cff1d94f9c4e956362952fa143969 )
P2P: allow connections only after having walked the specified distance, optimize connection behavior for N=2 peers using Bluetooth (by staying connected across multiple exchanges)
WARNING: beacon might be seriously impaired by now (no time to change that :( )
turn off compass calibration request voice
Merge branch 'develop'