* replaced use of a StringBuffer by a simple String concatenation as it is now optimized by the JVM
  * Other recent changes in earlier versions:
  * - Fix logger usage - third bunch of changes.
  * - Fix logger usage - forth bunch.
  * - Activate libnotify for debian and linux package, still to come activation in rpm package.
  * - Prevent Call Dialog from stealing focus.
  * - Commit from translate.sip-communicator.org by user acastroy.: 799 of 799 messages translated (0 fuzzy).
  * - Add extended changelogs as changelog for debian package, and changelog files for debs used by ui applications to display changes.
  * - Fixes a few warnings.
  * - Fix jabber keepalive thread to change state and not trigger re-registering.
  * - Removes lib/os-specific/mac/installer-exclude/dock.jar from the .classpath of Eclipse because it has been removed from the repository.
  * - - Add DTMF for DTMF RFC4733 Listener. - Now we can change the priority of send/receive threads (not activated yet).
  * - Commit from translate.sip-communicator.org by user mandre.: 745 of 799 messages translated (3 fuzzy).
  * - Show language options in their own locale. Suggested by Matthieu Casanova.
  * - Fix another bunch of unguarded logger.{debug,info,trace} calls. Ongoing activity to fix the usage of shown logger messages.
  * - Add ant script to build JNI libraries. Note that external libraries such as ffmpeg, x264, portaudio and speex must be compiled before trying to compile libffmpeg or libjportaudio.
  * - Fixing jabber asking for password on connection problems.
  * - Fix handling of logger message and level. Call logger message functions only if the logger level requires it. This avoids a lot of message formating, srting conversions and alike. This cover INFO, DEBUG and TRACE level messages. ERROR and WARN are not protected in this way. Implement a correct log-level reporting to Jain-SIP.
  * - Fixed bug reported by Lubomir Marinov on dev ( May 28, 2010, subject : "Call from history... strangeness")
  * - Keyframe indication in single NAL unit packet.
  * - Commit from translate.sip-communicator.org by user acastroy.: 798 of 798 messages translated (0 fuzzy).
  * - - Moves the "full screen" and "transfer call" buttons from the status bar to the call window button bar. - Prints DTMF chars, when dtmf key is typed or dial pad button is clicked - Fixes DTMF tones, when typed with modifiers (SHIFT-# for example) 
  * - Fixes a problem in the SDP negotiation of the media formats caused by considering MediaFormats withe same encoding, clockRate and channels (for AudioMediaFormats) to be different because they have different formatParameters.
  * - Ignore timestamp check for new NAL unit in H264 depacketizer and re-enable output bandwidth limit.
  * - Fixes the display of the peer avatar in the CallDialog and in the fullscreen window. It used to either be displayed underneath the remote video in the CallDialog or on top of the remote video in the fullscreen window.