[Azoth Sarin] Pass ToxThread to CallManager.
[Azoth Sarin] Instantiate the call manager.
[Util] Added ConcurrentException.
[Azoth Sarin] Added ThreadException.
[Util] Explicitly copy ConcurrentException on raise().
[Util] Added ExceptionWrapperBase.
[Azoth Sarin] Use ConcurrentException for ToxException.