Rename CASAppDelegate to SXIOAppDelegate
Filter window UI tweaks
Write out the calibrated exposure rather than the original one...
Set autosave name for Calibrate window
Save Calibrate window display scale in defaults
Add Clear button to Calibrate window to clear calibrated frames
Tweak layout of Calibrate window
Add Stack button to Calibrate window (not currently hooked up), add slight drop shadow to item image view