Multiclients progress bar
Adding support for progress bar in multiclients
This add supports for progress bar in multiclients mode (./bin/pvserver --multi-clients)
Especially it is :
- Adding a vtkCompositeMultiProcessController::GetController to recover non active controller
- Adding handlers in vtkSMSessionClients
- Sending progress events to all clients
- Triggering RMI for CleanupPendingProgress and MessageEvent on secondary clients
- Redifining PrepareProgressInternal and CleanupPendingProgress so they are called only on master client
Edited by Mathieu Westphal (Kitware)