Added `drupal-tags-autoupdate-enabled' and `drupal-tags-autoupdate-toggle'.
Removed my-lisp/*.elc and added a post-merge git hook to recompile the files
automatically after merging. git hooks have to be added manually, so I've
committed them to a root-level git-hooks directory, and I've added a start-up
test for their presence to help ensure they always get installed.