Added bias subtraction for CCDs into pipeprepare and autopipeprepare
Merge branch 'master' of https://github.com/cenko/RATIR-GSFC

# By John Capone
# Via John Capone
* 'master' of https://github.com/cenko/RATIR-GSFC:
  C0 and C1 ratdisp and ratdisp_calib lists are now by filter name, not camera name.

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