Adding a Catalyst test for ProgrammableFilter.

Change-Id: Id2a17eab6544fdc9056e13b031b84c19c2a6908c
Merge topic '14983_catalyst_programmablefilter' into next

2d93d6cb Adding a Catalyst test for ProgrammableFilter.
Fixing a compiler warning.

Change-Id: I5417c0a8d383a0c0649a6795d34a0fac70ec881f
Merge topic '14983_catalyst_programmablefilter' into next

0cb65d70 Fixing a compiler warning.
Expose SetComputeTolerance and Tolerance for vtkPProbeFilter

Change-Id: If67ec050b6906a79e694ce82811cd1d8e748ee73
Use VTK's 'FIX: Get rid of dependent properties.'

Change-Id: Iee582aa947b9d5d16f2fd52c4c095382cce4e590
Merge topic '13139-plot-small-geometry' into next

a0861b41 Use VTK's 'FIX: Get rid of dependent properties.'
5a7a5d52 Expose SetComputeTolerance and Tolerance for vtkPProbeFilter
Mostly just re-arranging guides in groups, but also updating more text.

Added new information about graphics on Ubuntu 14.04 EC2 instances,
also added a new guide highlighting some of the existing pvweb
applications, put this new guide into a new section called Sample
Applications.  Fixed up some of the Apache as a front end text as
well.

Change-Id: Id6e79c308d63414379779e4a9d5e3419de9ffb99
Merge topic 'pvweb-docs-further-reorganization' into next

720d7162 Mostly just re-arranging guides in groups, but also updating more text.