SIP protocol

Changelog:

. 0.1.4.0
  * Fix for making calls
  + Added MirVer (were possible)
  + Added popups to show errors
  
. 0.1.3.0
  * Fix for going online after connecting error
  * Fix for reconection crash
  + Added stun server to client API
  + Added list of hosts to client API

. 0.1.2.0
  + Support for clients (Example plugin at http://pescuma.googlecode.com/svn/trunk/Miranda/Plugins/sip_cli )

. 0.1.1.0
  + Build with vc6
  * Fix for wrong voice service version

. 0.1.0.0
  + Initial version