Making vtkACosmoReader take a complete list of files.

vtkACosmoReader needed the user to pick the last file in the series. That was
error prone. Fixing it to allow the user to pick the entire series of files and
vtkACosmoReader automatically picks the last file to extract information about
levels etc.

Change-Id: Ic2e93cf496a9c7fb0acafbab4c340a3443d6c48c
Streaming must resume after interaction.

Makes it possible restart streaming after user interaction. This make it
possible for streaming to resume after camera has moved.

Change-Id: Iaed9d6a4b33c4677edf463557e0693f25fe09254
Add Web protocol to list directory structure on pvserver side

Extend Existing directory proxy to allow remote directory listing from Python.
Add web protocol for FileBrowser widget using that new directory listing proxy

Change-Id: If7d5de6d8a965d848f2a428c7e16652d45271552
Make sure to invalidate viewport when switching the active one

Change-Id: I561a5cf9a86b2ba1e2f0e8e08992ea1d6f7a49be
Bring WebGL fix

Change-Id: I368af6938b5e11b1a083a57dfdb29965b198025d
Merge topic 'pvweb-proxy-file-listing' into next

90afaa3 Bring WebGL fix
902deac Make sure to invalidate viewport when switching the active one
b72daab Add Web protocol to list directory structure on pvserver side
Enhancements to particle streaming.

Enhancements to particle streaming to allow purging of particles as user zooms
out -- consistent with past versions of the functionality. Also added mcehanism
to show outlines for blocks being fetched as well as change opacity for the
particles.

Updating vtkStreamingParticlesPriorityQueue to make it easier to change the
comparison operation based on the nature of the dataset.

Change-Id: I96d2bee8cc3b4782496a3ecae2f07411a53fa7f0
Merge topic 'fix_particle_streaming' into next

8123ab9 Enhancements to particle streaming.
8817ed1 Streaming must resume after interaction.
abbc0e0 Making vtkACosmoReader take a complete list of files.
Integrate vtkWeb file browser to Web Visualizer

Change-Id: Iee0bb62521a108ca60c51d505d0db88bc42aed40
Merge topic 'pvweb-group-file-in-visualizer' into next

9a71c7d Integrate vtkWeb file browser to Web Visualizer