pr:status added
refactored uri assignments to accomodate some growth - type has a
separate ns and must be a java.net.URI because libSBOLj says so
added dc:creator and dc:date; new xmlns broke many tests, needs fix.

This is a first pass that works.
 A little messy in code organization, the suggestion by Matt in the
issue comments is better. The tests should be getting created using
Rsbpml objects. Then It dont have to rewrite all tests everytime i
change top :)