Added function get_metadata to imaging_pipeline.py. Fir Ticket#113.
Changed get_metadata() to return a dictionary instead of a tuple. For Ticket#113.
Added ability to specify parameters for cosmicx for particular detectors. These parameters should now be included in the log, as a dictionary. This version of the pipeline has not yet been run. For Ticket#113.
Changed cosmicx cfg files so PyYaml interpreted None instead of the string None. Fixed invalid raise exceptions statements in lacosmicx. This version of the pipline has successfully run locally. For Ticket#113.
Uncommented the database setting in template_settings.yaml, so that tests which look for it will pass.
Removed some print statments from testing. For Ticket#113.
Merge pull request #119 from STScI-Citizen-Science/metadata

This merge adds the instrument specific .yaml parameter files to be used by cosmicx.py as well as the get_metadata function to read them in.