Reimplemented run_imaging_pipeline.py to support multiprocessing. Added organize_logfiles function in setup_logging.py to organize log information. For ticket #94.
[UPDATE] Reimplemented run_imaging_pipeline.py to support multiprocessing. Added organize_logfiles function in setup_logging.py to organize log information. For ticket #94.
Removed organize_filetree feature to remain log information in just one file. For ticket #94.
Merge pull request #107 from STScI-Citizen-Science/parallelize-imaging-pipeline

Parallelize Imaging Pipeline

This merge add parallel processing to the WFPC2 imaging pipeline. 

This build fails but the next merge from @kevinfhale should fix that.