LiveView: replaced Cairo matrices with Gg.M3 matrices
LiveView: use Gg.V2 for coordinates
Align: added a 'mark' button for marking position
Align: support interrupting with ctrl-c
LiveView: properly scale and center the image regardless of scale or orientation
Align: make use of the real cnc location, not the one made up
CncControl: report all three coordinates with properly sized box
CncControl: the local coordinates should now track the real ones.. Maybe should remove this thing.
Align: update info view on CncControl's coordination information on start
Cnc.process_json: deal better with non-sr-messages on startup
Align: GUI for calculating camera-drill distance
Align: added tooltips to the alignment buttons
Align: added ability to switch between camera mode and CNC mode
Align: setting camera alignment switches to camera mode
Align: the cnc-camera offset can be provided as a command line switch --camera-offset