Release 0.4
* Fixed 4 deadlocks conditions in onAlerting, onReceivedDigit and 
  onCallExstablished funtions
* Added Thread/Mutex debugging option, for debug build
* Fixed bug causing dialed digits alias being set as a char string


Release 0.2
Added support for gsm, g729a, g723.1
Added call end cause conversion logic from H323 cause to asterisk cause
and viceversa
Added multihomed support.

Release 0.1
Can do basic call setup stuff.
