watcher 6.x-1.0-alpha3

- DATABASE CHANGES, don't forget to run update.php!
- #358709: Clicking watch link induces fade effect, but message and icon remain the same: Fixed.
- #359471: undefined function _watcher_db_get_user_settings() : Fixed.
- More options for anonymous users, watch for comments, updates or both.
- Introduced watch_for column in the watcher_nodes table.
- Fixed a number of not reported bugs.
- Binder/other users' watcher posts lists now work as they should.
- Statistics page now also shows the number of anonymous users watching nodes.
- Removed hook_user op: view implementation, a menu tab now serves as the link to a user's list of watched posts