SIP SIMPLE client SDK is a Software Development Kit for development of
Real Time Applications based on SIP and related protocols for
Audio/Video, Instant Messaging, File Transfers, Desktop Sharing and
Presence. Other media types can be easily added by using an extensible
high-level API.

Its primary purpose is to be a dependency for the Blink SIP client.
It is also the backend for the sipclients3 command-line sip toolkit.

This build ships its own versions of pjsip/pjproject, and ZRTPCPP.
Please, report conflicts if discovered.