driver picgs: change information string into comment

Not useful for the behaviour, so don't let Python hold it in memory
driver pigcs: error messages

List compiled by Andries, from the manual.
Not yet used, but hopefully will be soon.
acq stream: default drift correction period to 10s

One minute was too slow in most cases where drift was needed.

The real fix will be either to have a way to ask the user, or to automagically detect the drift speed.
Small history overlay test case modifications for performance testing
Small change to the XRCed launch script that automatically adds the Delmic XRC plugins on launch
Handle NavCam HFW
Merge branch 'master' of delmic-server.local:odemis
LensAlignment integrated, hole detection simplified
PatternScanner moved to separate class
Bug fix in FindCircleCenter
Calibration script
Change circle radius precision
Expected lens radius changed
Do not move stage in lens alignment
NavCam test image added
Fix components role, focus in navcam
Merge branch 'kimon-DelphiAutoCalib' of vpn.delmic.com:odemis into kimon-DelphiAutoCalib