move bridge creation to mod.html -- that way, the bridge is created the first time someone asks to create a webwork set. this allows us to provide the create/administer ww course links right away. cleanup, formatting. the bridge creation is actually done in _wwassignment_ensureBridgeExists in lib.php. also, i hate php.
Changed paths:
trunk/wwmoodle/wwassignment/lib.php
trunk/wwmoodle/wwassignment/mod.html