Add method that sequentially works the steps we have to do
before sending first presence
- Move Delimiter into own module
- Move Metacontacts into own module
- Add support for Pubsub Avatars
- Dont poll for vCard Updates, only use XEP-0153
- Dont cache vCards
- Store the avatar SHA of roster contacts in the DB
- Store the current SHA of each contact in the Contacts Object
- Move some code into the ConnectionVcard Class