Asterisk 12.0.0-beta2

- A more flexible bridging core based on the Bridging API

- A new internal message bus, Stasis

- Major standardization and consistency improvements to AMI

- Addition of the Asterisk REST Interface (ARI)

- A new SIP channel driver, chan_pjsip

siehe -> https://wiki.asterisk.org/wiki/display/AST/New+in+12