VSS usernames are supposed to be case insensitive.

See <http://news.gmane.org/gmane.comp.version-control.subversion.vss2svn.user>
The thread "Usernames and case-sensitivity" from 2007-01-06.
Fixed typos.
Need to check in two places for destruction.

Also added code for handling DELETEd files.
Added ability to output to git repository.
Use File::Spec and IPC::Run.

This should fix shell quoting stuff.
Replaced DeleteChildRec with mass delete.