Create New Runner / CLI script for main StreamCat process

[TravisH18]

A new script to "replace" main python file (StreamCat.py) to allow users to specify all kinds of arguments per run.

Should include (but is not limited to) the following arguments:

• use_arcpy
• config_path (path to stream_cat_config.py) (another option would be to allow specific arguments in the config file to be separate arguments so they can be changed on each run)
• num_workers for parallel processes
• write_to_database (bool - whether or not to connect to db and set execute = true)