In the distcc man page:
- remove description of a bug that's been fixed now (distcc issue 7)
- make it a little clearer that in pump mode we don't ship the header
  files from the default system header directories to the server
- add a new section header "RESTRICTIONS OF PUMP MODE"
- some typographical corrections.

In the pump man page:
- add a prominent pointer to the distcc man page,
  in particular to the "RESTRICTIONS OF PUMP MODE" section.

Reviewers: Craig Silverstein

-- refer to pump(1) credits (and remove distcc(1) credits from pump(1) credentials)
-- detail fundamental include server assumption
-- clean up incl server discussion
-- refer to include_server(1) for hairy stuff (this man page is to follow shortly in separate CL)
-- discuss shell scripts instead of symlinks
-- change date to June 2 2008
-- other minor edits

1) Replace http://distcc.samba.org with the new google code location
2) Add favicon.ico from the distcc.samba.org site
3) Use distcc@lists.samba.org as the only distcc mailing list (there
   were at least three mailing lists scattered around the docs, some of
   which don't even exist anymore!)
4) Update man pages and other docs to not use "distcc-pump" anywhere;
   it's now "pump mode" or "distcc's pump mode", or "distcc-pump
   mode".

I also add, to the README, some discussion of scaling to hundreds of
machines.

Reviewed by fergus and klarlund

The contents are similar to the output of "pump --help",
but with a bit more mark-up, and with additional sections
"INVOKING LSDISTCC", "BUGS", "AUTHORS", "LICENSE", and "SEE ALSO".

Reviewers: Craig Silverstein, Nils Klarlund.