Uncommented out the unsetting of SQL connection parameters (when debug printing $bigtree, we don't want those to accidentally be seen).

Fixed issues when a sql_mode is set to strict (should now be cleared for the BigTree session).
When updating a module with group based permissions, the related view caches should be cleared now.
Added a note explaining List Parser Function in Many to Many.
Instructions were backwards.
Merge branch 'development' into 4.1
Added the ability to degrade HTML areas to Simple HTML if a user is not an administrator / developer.