Release v2.3.0
Adds the following APIs
- Opentok#MuteSession
- Opentok#MuteStream
- Session#Mute
- Session#MuteStream
- Session#SendSignal
- Session#SendConnectionSignal
- Opentok#SendDTMF
- Opentok#SendDTMFToClient
- Session#Dial
- Session#SendDTMF
- Session#SendDTMFToClient