Support more readers, msvVTKEmbeddedProbeFilter.

Also add TimeGrid2 data for testing msvVTKEmbeddedProbeFilter.
Minor change to TimeGrid1 data.
Issue #20
Sample point coordinates. Pass through input arrays.

Also improve documentation.

Issue 21
Merge branch '21-msvVTKEmbeddedProbeFilter' into GridViewerApplication
Update multiple time-varying pipelines.

msvQTimePlayerWidget only has one current filter which it propagates time updates to.
This change updates the current time for all mappers of visible actors.
Issue 20
Add test and data. Fix PrintSelf.

Issue 21
Merge branch '21-msvVTKEmbeddedProbeFilter' into GridViewerApplication
Fix linux line endings
Minor: Remove needless comments.
Merge branch '21-msvVTKEmbeddedProbeFilter' into GridViewerApplication