fixup! Add CLI to run any Python program based on argparse

gooey/cli.py

@@ -10,16 +10,20 @@
 def main(args=None):
     args = args or sys.argv[1:]
     if not args:
+        # without args we assume we want to run gooey on gooey itself
+        # TODO: rewrite using argparse
         script_name = "gooey"
     else:
         script_name = args[0]
     scripts = {script.name: script for script in entry_points().get('console_scripts')}
     if script_name in scripts:
+        # a valid script was passed
         script = scripts[script_name]
         module_path = script.module
         function_name = script.attr
         prog = script_name
     elif ':' in script_name:
+        # the path to a function was passed
         module_path, function_name = args[0].split(':')
         prog = module_path.split('.', 1)[0]
     if len(args) > 1: