[API|FEATURE] removed Screen Sharing

This feature is FAR away to be an OOB feature.

While this may still work on *NIX systems there are no binaries
available for Windows (at least the official Xuggler site). While
there might been binaries releases for x86 systems I only found one x64
distrib. with NO installer.

It is currently easier to just install VNC Server / Clients than to use
this feature (possible over a 4 kb/s IBB connection) that will result in
*amazing excitement* on the end user side along with all bugs in the
StreamServiceManager aside from the serious UX issue that this feature
have.

Short version: remove this crappy feature.

TODO: remove the crappy "VOIP" feature.

PS: professional developers know their tools ... do not try to implement
something that other tools are already accomplishing pretty well
!

Change-Id: I435ba0e64ac93deb8f51837ebc8b5d8ecb53e969
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1332
Tested-by: Jenkins CI
Reviewed-by: Nils Bussas <nils.bussas@gmail.com>
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>