cleaned up command_list
cleaned up interaction_manager.py
command_parser.py cleaned up a little.
ran pep 8 parser against interaction_manager and user_input
comments in user_input and text_logic
formatting and commenting for cursor_logic and graphics_logic
ran pep8 linter and commented large sections of code base
Merge pull request #8 from swong15/pep8_cleanup

Pep8 cleanup