allow_sameorg: remove whitespace
reintroduce allow_functionality subscription
 * contains rules needed for the top100 websites to work as expected
 * top100 list from http://www.alexa.com/topsites
 * these rules are not suitable for allow_sameorg (cross-site requests from/to different organizations)
 * add back allow_functionality entry in official.json subscriptions list
 * fixes https://github.com/RequestPolicyContinued/subscriptions/issues/9
update README
README: add reminder to enable subscriptions when working on them
Merge pull request #13 from nodiscc/master

reintroduce allow_functionality subscription