Imported from archive.

Imported from archive.

* all files: Lower-cased any MUDpy references to mudpy throughout
the code.

* muff: Collapsed the Python module package directory into a single
mudpy.py module for now, to simplify on-the-fly source code
reloading functionality (this will be re-split in a more effective
fashion later).

* testdata: New example data file with generic contents.