Changed order of community methods, on_intro_request check for my_member
mid instead
No more _decode_message, changed some of the DropPacket exceptions to
only use can_decode_message
Remove length constraints from decode_message, can_decode_message has to
handle those.
Spelling mistakes + shortened method name
Merge pull request #282 from NielsZeilemaker/intro_duplicates

Intro duplicates