- check for node->op = submit should be enclosed in t()

Changed ['changed'] on autosaving a new node to relect the lastest timestamp as subsequent autosave fails

- Wasn't aware that theme_status_messages exists; used that instead of going through drupal_get_messages

- Fixed a bug where autosaved nid was not cleared when node is not submitted. Subsequent nodes will then use this nid which screws up everything.
- Uncommented a code which is supposed to clear messages after a node is autosaved; don't wanna bombard users with too many messages in the next page they visit.
- Added a few comments.

-Used Drupal namespace for functions.
-Add in global killswitch for js.

Fixed a bug that led to a new node being created instead of overriding the autosaved revision when node form is submitted