Stable version 1.2.0 released

This release is the first to have been ported to ARM. As a result of this effort, users can now choose to disable many features/dependencies.
In addition, video support has been greatly improved, with features such as call transfer, hold, and H.264 profile and level negotiation implemented for video calls.
In the gnome client, instant messaging was reimplemented and as a result, no longer depends on Webkit.
Finally, we updated PJSIP to the latest release of their 1.x.x series, 1.14.2.