removing unneeded Data::Dumper code

Hey ubu!

Several bits of this code load Data::Dumper, even though it's not listed in the Makefile.PL. Aside from the extra dependency, tests only pass because Data::Dumper is core :D 

This patch removes all calls to Data::Dumper. There is not a single call to "Dumper" in the code now (except for SAXDumper on the tests, but that's another thing entirely)