Allow selection of FITS header for legend
Allow offset and monochrome plots
Add dark frame to examples
Add rudimentary sky subtraction to bin.py
Add binned dir to make clean target
Update changed and added method signatures
Add script to show decimal date of fits file
Remove defunct Reference class
Ignore example build directories
Add script to convert 8 to 16 bit fits
Add 3 decimal points to decimal day
Add non-linear calibration support to quicklook.py