Remove deprecated methods community.get_member() and get_members_from_id()
deprecated decorator
convert get_members_from_id to get_member_from_id
and implement a deprecated wrapping function for it.
This fixes the possible infinite key requesting loop we found.
Refactor _decode_member_authentication to use Dispersy.get_member_from_id()
Small statistics fix
Merge pull request #216 from whirm/decode_message_fix

Decode message fix