* test names in conference_test
* raise error on attempt to invite friend to group before we are connected
* revise handling of temporary invited connections
We are now careful not to prematurely delete a connection to a peer
established during the invitation process; namely, before we have sufficient
other connections and have confirmed that we have an alternative route to the
peer.
* process out-of-order messages from a peer
* don't reset names when handling a Peer Response
Also, renamed simple_conference_test to conference_simple_test so it's
sorted together with the other conference tests.
Next step is to use run_auto_test.h for the conference test.
