Help module

[MatthewBaggins]

closes #107 and fixes #297

HelpModule:

• List modules
  • s, list modules
• Help - (1) a particular module or (2) a particular command defined on a module
  • s, help <module-name> - returns description of a module and lists all of its commands
  • s, help <command-name> - returns description of a command

You can also run python build_help.py to build help.md from docstrings

Docstrings in utilities.help_utils.py contain specification how docstrings should look like for parsing to work correctly.

For now, I wrote them for Questions, QuestionSetter, TestModule, and HelpModule