Refactor various modules to handle JSON configuration

[txoof]

• get_help generally needs to be rewritten to work better with CLI/web configuration
  • _get_sample_config points at INI version; consider removing entirely
  • _get_data_keys not really supported properly in plugins
  • _get_moudle_docs update plugins so update_function ends docstring with %UF rather than %U to make it easier to pull just userfacing functions
• run_module make sure this works appropriately for web config
  • add_config likely needs to be removed; no longer valid with new configuration methods/JSON structure