Add RFC4122 compatible uuid generation
Added capability to persistent UUIDs for SipApps
Added add_sip_instance/2
Rework of UUID apply
Add outbound_proxy options
Contact generation for outbound
More robust uri parsing
Check UAC for outbound
Fix errors
Outbound proxies automatic config
UDP "connection" first support
STUN rework in udp transport
Keep Alive in tcp transport
UDP support in nksip_transport_srv
UDP transport rework in nksip_transport
Start ping on specific response
Add default 'outbound' support
Default times for keep alive
Time Alive support for UDP, TCP/TLS and SCTP
Doc updates