adding silence as a spandsp "tone" option
DE40 handling hangups correctly and adding sane playback wait timeout
US45 moving DETECTED_TONE event filter from live to beep detection
DE130 don't fetch XML if hangup waiting for key press
DE137 will do postbacks or refuse calls if disconnected
Update plivo_install.sh
Update install.sh
Merge ../plivo

Conflicts:
	src/plivo/rest/freeswitch/elements.py
Update plivo_install.sh
US507 cleanup after merge