Rewrite of Python PalmDB

Python PalmDB has been almost completely rewritten to make it much easier for people to write converters for PalmDB.
I will probably end up rewriting it some more, but this should give you a good idea of the direction things are going in.
Python PalmDB now converts between the Palm PDB format and XML.
With special plugins it will also write to 3rd party XML formats (IE with XSLT).