The new preferences code is much easier to work with. Rather than
inheriting from a complicated tree class, I just set values in a python
dictionary directly.
I commented out most of the code in libsaria/__init__.py to make it
easier to clean up. I also began work on libsaria/prefs.py for managing
preferences.
NOTE: For the next several commits, the best way to test changes is by
importing libsaria through the python interpreter. Trying to run
ocarina will probably fail.