FileSystemPathBinding fix.
CompoundPathFilter done.
Added pointer declaration for CompoundPathFilter.
Added pointer declaration for PathFilter.
Reimplemented FileNamePathFilter in C++.
PathFilter making userData on demand.
Added CompoundPathFilter( [ list, of, filters ] ) constructor.
Half-done FileSystemPath::createStandardFilter()

Need new filter features to do the rest.
Fix for python object identity problem.