Job argumnet creation is now actually legible AND works with the new style of inputs/outputs as well as job definition files.

Heavily updated workflow_job parsing & validation.  Addeded several tests to confirm the validity of new parsing.  additional_inputs no longer exist, and input / output files are defined as dicts instead of lists.  References refer directly to the dict key names instead of a list index.

Fixed several more yaml job files.  Removed unnecessary duplicate cp_bed_tagalign files.  Updated peak_call.yaml accordingly.

Updated all yaml files to support type argument.  Heavily updated workflow_job parsing and verbosity.

Added download script.  Updated job yaml.  Updated module yaml.  Add executable loading to workflow code.  Updated database validation for new inputs.