Import yateclient-4.2.0.2 as wip/yateclient.

YATE - Yet Another Telephony Engine
-----------------------------------

The YATE project aims to be a fully featured software PBX.

It was created to alow developers and users to have more functionality and
scalability. To reach this goal YATE is built from two kinds of components:
 1. The main engine - telengine.
 2. Modules - routing modules
            - drivers
            - script language bindings
            - billing modules
+yateclient