Use lowercase name internally in the CaseInsensitiveOrderedDict
Use lowercase name internally in the CaseInsensitiveOrderedDict

This makes the names of functions match the python-style lower case instead of FITS-style upper.

indiajoe/ccdproc,crawfordsm/ccdproc,evertrol/ccdproc,pulsestaysconstant/ccdproc,mwcraig/ccdproc,astropy/ccdproc