Bug fixes

Fixes a little bug which generated a PHP error.

- added search form
- refactored layout to increase compatibility with IE6/IE7

- added search form
- refactored layout to increase compatibility with IE6/IE7

bugfixes:
http://drupal.org/node/232903 (implications barfing all over the place)
http://drupal.org/node/227939 (blocks showing all relationships)

new feature: Node Access

Fix #233040. Add index to handle comment deletion more rapidly.

Bugs fixed:
- #219778: Remove grants when roles are deleted, purge orphaned grants.
- Update moderator(s) when changing forum.
- #230123: Newest pgsql refuses to do automatic type conversions.
- Provide a message for uninitialized forums when newly installed, rather than the incorrect 'default' setting of grant_all for 1 & 2.
- #221095: Fix caching in forum_access_access(), by Josh Benner.