Merge topic 'forward-to-vtk-master' into pv-master

45985cf Merge topic 'fix-matplotlib-math-text-segfault' into master
73723f8 Merge topic 'AddSupportForBufferImageReaders' into master
169c9bf Fix segfault in vtkMatplotlibMathTextUtilities destructor
49360b7 Merge topic 'send-material-parameters' into master
1013348 Merge topic 'wrapping-external' into master
a55006c Check if the PythonD target exists
d8df7db Merge remote-tracking branch 'pvvtk/pv-master' into HEAD
5125955 Merge topic 'TreeHeatMap_RemoveInput' into master
6d8e160 Merge topic 'cleanup_RAdapter' into master
2b59d8a Merge topic 'execute-with-info-doc' into master
8087e82 Add vtkPainterDeviceAdapter::SendMaterialProperties()
2319cdc Merge topic 'fix_filter_precisions' into master
8803e22 Fix testing macros.
f830ef4 Fixing loss of point-precision in certain filters.
24b6f09 Merge topic 'vtkPolyData_documentation' into master
f2846ae Merge topic 'fix-warnings' into master
...
Merge remote-tracking branch 'pvvtk/pv-master' into HEAD

* pvvtk/pv-master:

Change-Id: Ie6c16b583147a8b836ae0db48a7365b9b5adc3f0