Refactored Assignment Module

============================

This new assignment module allows Plugin Assignment types.  This should
allow a whole lot of new stuff to easily be placed in Moodle without
making the modules list longer for no good reason.

This checkin is still a really rough version that needs work on it.
Normally I would want it better than this to check in, but I need
to collaborate with Shane on the remaining code and CVS is the best
way.

Give it a day or two to settle in.  :-)

This is the last thing I wanted to get into 1.5.  Getting close now!!

Cheers!
Martin

mod/assignment/db/postgres7.sql

@@ -8,11 +8,12 @@ CREATE TABLE prefix_assignment (
   name varchar(255) NOT NULL default '',
   description text NOT NULL default '',
   format integer NOT NULL default '0',
+  assignmenttype varchar(50) NOT NULL default '',
   resubmit integer NOT NULL default '0',
   emailteachers integer NOT NULL default '0',
-  type integer NOT NULL default '1',
   maxbytes integer NOT NULL default '100000',
   timedue integer NOT NULL default '0',
+  timeavailable integer NOT NULL default '0',
   grade integer NOT NULL default '0',
   timemodified integer NOT NULL default '0'
 );