Xpra

* fix launcher on MS Windows, better SSH support
* fix python2.4 compatibility in icon grabbing code
* fix liba [] compatibility on MS Windows with VisualStudio
* fix exit message location
* prevent invalid Python bindings version from being included in the MS Windows installer

* fix server crash with transient windows

* fix hello packet encoding bug
* fix colours in launcher and session-info windows

* Python 2.4 compatibility fixes (CentOS 5.x)
* fix static builds of vpx and x264

* fix liba [] uninitialized structure crash
* fix warning on installations without sound libraries
* fix warning when pulseaudio utils are not installed
* fix delta compression race
* fix the return of some ghost windows
* stop pulseaudio on exit, warn if it fails to start
* re-enable system tray forwarding, fix location conflicts
* osx fixes: encodings wrongly grayed out
* osx features: add sound and speed menus
* remove spurious "too many receivers" warnings

* fix server daemonize on some platforms
* fix server SSH support on platforms with old versions of glib
* fix "xpra upgrade" closing applications
* fix detection of almost-lossless frames with x264
* fix starting of a duplicate pulseaudio server on upgrade
* fix debian packaging: lint warnings, add missing sound dependencies
* fix compatibility with older versions of pulseaudio (pactl)
* fix session-info window when a tray is being forwarded
* remove warning on builds with limited encoding support
* disable tray forwarding by default as it causes problems with some apps
* rename "Quality" to "Min Quality" in tray menu
* update to Cython 0.18 for binary builds
* fix rpm packaging: remove unusable modules