Merge branch 'ticket-15' into ticket-68
qrlib: enable slf4j based logging
qrlib: convert the print statements to log statements
qrlib: add copyright header to log constants
Output some performance metrics for QR code transmission
Merge branch 'master' into ticket-68
Merge branch 'ticket-79' into ticket-68
Stop logging message data since it might not be text based
Added the following performance metrics for QR code transmission
  * Rx: Time to complete message after 1st valid QR code read.
  * Rx: Number of frames recieved from camera
  * Rx: Number of frames with QR coded detected in it
  * Rx: Number of frames with detected QR codes
  * Rx: Number of duplicate QR codes decoded
  * Tx: Whether QR code labels are displayed.
Force camera to autofocus whenever it gets initialized.
Provide better defaults for QR densities
Record the actual time Tx takes to display a frame
cleaned up the default settings and changed some of the displayed names
Merge branch 'ticket-68'