WIP comment for dark current image access
Initial commit of scripts to update aca_dark archive
Add code to make dark cal properties file
Add common.py for common definitions, e.g. MissingDataError
Add mica/archive/tests/__init__.py
Add zodiacal brightness, attitude, sun position to properties
Add .gitignore
Move aca_dark file definitions into common module files.py
Rework file definitions some more
Rework file management