Integration of David Black's text

- Updated name and title
- Added more references
- Changed from informational to standard track
- Changed date to simply the year
- DiffServ section completely rewritten by David Black
- DiffServ and Transport Protocols section rewritten
- New section on "Traffic Classifiers and Remarking"
- Other tweaks and cleaning
Resolved conflict with a merge

Conflicts:
	draft-york-dart-dscp-rtp-00.xml
Deleted txt version from repo