Removed sessionid
Add UUIDs to messages and circles
Find existence by id for circle/message
PublishMessage moved to service layer
PublishMessage checks member/ownership
Add GetCircleId service
Improve Join (still needs to joinCircle by id)
Refactor CircleExists to be perspective
Disable logging by default in testing mode
Correct field to be 'Authorization'
Fixed bugs in JoinCircle
Block relations are created in correct direction
Fix block inconsistencies, tests passing
Merge branch 'messages'