Result of -[CASCCDExposure copy] now has a new uuid
Add -luminance:
Set rgba field correctly when reading an exposure
Missed a file
Add debater batch processor, fix stacking count, don't subtract both dark and bias when correcting
Add debayer batch history
Show debarred label on thumbnail
Always show corrected/debayered if available
Remove dead code
Remove unused batch processing code, start sorting out nested histories
Add defensive assert
Get staking of debayered images working, make rgba a property derived from the pixel format rather than a separate flag