Swapped build tools from pyinstaller to cxfreeze

cxfreeze was chosen for a couple of reasons:

* It's simpler, which should make packaging for other platforms
easier (and should save a lot of time)
* It has Python 3.0 support right now. At this point, wxpython is
the only thing keeping us from porting to 3.0, but that should change
when Phoenix python is released
Updated basepath to use cxfreeze when frozen
Added basepath to config