implement text-to-speech via IRC command
supybot: save channel config, also join #stratum0v
supybot: implement xkcd #149
API: also include a field "openedBy" which contains the name of the entity who opened the space
StratumVoice: need to touch /var/run/stratummonitor-netscan at boot so supybot plugin is not confused if it is not there
StratumVoice: detection of present entities in space now also works via mDNS