Work in progress refactoring PixelStream

Change-Id: Ibee6b7298e1e38900dd70ff60e9d5f92478d1273
Renders only the first frame then stops

Change-Id: I08c51ab8a70814e9efc3188e26632aef87736f99
First working implementation, but terribly slow...

Change-Id: I1d7a90b5eb21fcff28a44a1edef6ad3c79cc865a
Move classes off DisplayGroupManager and to NetworkListener

Change-Id: I63fad5ad5956b0b7dfde754737c043ee84ed8567
QTimer for sending the frames...

Change-Id: I9595c221302d8948096adb172914e443961888dc
Added fps statistics. The dispatching works quite well with a timer. Consider having a separate thread for sending MPI messages to avoid slowing down the main window's EventLoop.

Change-Id: I56080b7fa9b4a38701a7a296f4935c85e8210bf2
Removed the SVGStream

Change-Id: Ib46e1394badcfaf42822f08a218ccc530af2bd36
Big cleanup and documenting of the code

Change-Id: Id2c5614f504db12d026e145b886fbece07ce4979