Add functionality to exclude crawlers and to exclude access logging.

I needed to exclude web crawlers (requires browscap) from the view counts and also not add them to the accesslog, if access logging is enabled. I have written a patch that includes this functionality and also moves the admin page to admin/config/system and fixes a bug with the incorrect treatment of UID 1. I hope it gets adopted as it makes this the only D7 module with this capability.