Selections, Characters, and Processing

- Added ability for non-linear story line.
- Added features to wordProcessing.py to process selections as well as
linear dialog.
- Added features to main.py take input from user when the story line is
a selection as well as linear dialog.
- Added features in main.py to determine the next line of the story.
- Added features in main.py to add a character to the story line.
- Added features in graphics.py to display a character.

TODO:
- Modularize program by adding classes.
- Create a start menu.
- Add a story line.
- Create more sprites for characters