GDP: pitches second draft

[Graham Percival]

GDP has a new home, which should be much more reliable:
http://web.uvic.ca/~gperciva/

(follow the link to GDP output)


This is the second draft of Pitches.  Please have a look; it's been 
significantly updated.  Remaining items are

Misc formatting:
- add more links to glossary
- maybe more links to other manual sections
- make sure the entire section is consistent in the general
  formatting


- clean up any TODO or FIXME items!!!
    - DO NOT bother with @lsr stuff right now.  We're getting tags
      setup with lsr, so this will change in the near future.




Please let us known if there are any other issues that should be addressed.

Cheers,
- Graham