re-link the STK library in the audio-mixer
add a map for TwoPole objects to AvatarAudioRingBuffer
remove thread link to audio library
add a TwoPole low pass filter for each source for each listener
tuning TwoPole effect in audio-mixer
add a Logstash class to prepare for sending stats over UDP
send stats to graphite on same interval as DS checkin
remove the debug printSocket variable