calibration data for new camera/lens
camera: added roll_limit setting
camera: don't try and re-open chameleon too fast
scanner: make blue emphasis configurable in scanner
scanner: only merge large overlapping if more than 20 regions

this tries for a compromise between large merged regions and lots of
regions
cuav_region: new scoring weighting

use a weighting between compactness, hsv score, saturation range and
scanning score
camera: adjust default scanner parms

and add BlueEmphasis parameter
geosearch: adjust default scanner parameters

and add BlueEmphasis parameter
cope better with image load errors
camera: added some todo items
mosaic: fixed a click exception
camera: more todo items
added --HIL option to playback.py
added test_plane_HIL.sh