Updating the mediagoblin manual's foreward:

- Removing contributors section of the foreward... we should have a
   contributors list, but it doesn't belong here.
 - Specifying that this manual is not contributor-oriented... it's for
   local users/administrators
 - Updating issue tracker link
 - Adjusting the "living document" line to mention
   http://docs.mediagoblin.org

docs/source/foreword.rst

@@ -8,34 +8,27 @@ About this manual
 This is the GNU MediaGoblin manual.  This documentation targets the
 following groups of individuals:
 
-* people who want to use the software
-* people who want to deploy the software
-* contributors
+* people who want to try the software locally
+* people who want to deploy and administrate the software
 
-This manual is a living document and is in the ``mediagoblin``
+This manual doesn't cover contributors to the codebase.  But we want
+and love contributors!  To join as a contributor please visit the
+following pages instead:
+
+* http://mediagoblin.org/pages/join.html for general "join us" information
+* http://wiki.mediagoblin.org/ for our contributor-focused wiki
+
+If you are viewing this from http://docs.mediagoblin.org be aware that
+this manual is a living document and is in the ``mediagoblin``
 repository in the ``docs/`` directory.
 
 
-Who wrote this documentation?
-=============================
-
-In no particular order:
-
-* Chris
-* Will
-* Deb
-* Greg
-* Karen
-* Matt
-* Asheesh
-
-
 I found an error in the docs---who do I tell?
 =============================================
 
 There are a few ways---please pick the one most convenient to you!
 
-1. Write up a bug report in the bug tracker at http://bugs.foocorp.net/ .
+1. Write up a bug report in the bug tracker at http://bugs.foocorp.net/projects/mediagoblin/issues
 2. Tell someone on IRC ``#mediagoblin`` on Freenode.
 3. Send an email to Will ``willg at bluesock dot org``.