move validateUser to moderator api
add voteForUser in book api
rename blockUserRegistry to banUserFromCommunity in moderator api
move invitPeople in user
add RETURN_REGISTRATION_VALIDATION_REQUIRED_PARAMETER const
update to util v1.0.19
add already accepted by user const in api
Merge pull request #7 from gsaunier/master

add already accepted by user const in api