Variables that do not belond in addthis_config should be stored separately.
-rwxr-xr-x 84 addthis.admin.css
-rw-r--r-- 15153 addthis.admin.inc
-rw-r--r-- 99 addthis.info
-rw-r--r-- 4247 addthis.install
-rw-r--r-- 12881 addthis.module
-rw-r--r-- 1218 addthis.views.inc
-rwxr-xr-x 2622 addthis_handler_field.inc