Merge pull request #8 from nodiscc/master

update README
Merge pull request #11 from nodiscc/master

review official-allow_sameorg.json
Merge pull request #12 from nodiscc/master

allow requests to same organization domains for world's top100 domains
Merge pull request #13 from nodiscc/master

reintroduce allow_functionality subscription
update README for contributors
more rules for official-allow_functionality.json
more rules for official-allow_functionality.json