Calibration data saving in /etc/psmoveapi on Linux

Calibration is saved in /etc/psmoveapi for root user on Linux.
Non-root users read calibration first from local ~/.psmoveapi
directory and then from /etc/psmoveapi if there is no local
calibration data.
Daemon mode for psmovepair

Psmovepair can be run as daemon monitoring for controller
connections via USB and automatically performing pairing procedure.