v0.5

- Made the wipe() method universal in main.py and made it do a proper
'cls' or 'clear' depending on your OS, rather than just lots of empty
lines, although the engine still uses empty lines to force text to the
bottom of your console window lol...
- Rearranged a lot of code and cleaned up the two oldest rooms (which
didn't follow new conventions I had invented by the time I got to the
third room).
- Fixed some major bugs.
- Improved the lexicon.