- get_msg_index()
- get_msg_header()
- get_all_msg_headers()
these functions all accept a new (optonal, last) bool argument "include_votes"
which defaults to false. So if for some reason, you want to load votes, just
pass an additional 'true' argument.
ToDo: polls and vote tallying.
At least for now, existing JS stuff that uses the MsgBase object won't get
messed up by the new voting messages.