Back end data storage separation.

Back end data storage separation.

* lib/mudpy/__init__.py (modules): Added the new data module to the
list.

* lib/mudpy/data.py: Implemented a new module to contain back end
data storage and retrieval functions, preparing to merge work on the
new data handling routines.

* lib/mudpy/misc.py (DataFile, find_file, makedict, makelist): Moved
to lib/mudpy/data.py.
(Element.__init__, Element.getdict, Element.getlist, Universe.load)
(replace_macros): Updated references to relocated classes and
functions.