Merge topic 'enable-new-vtk-image-filters' into pv-master

a6b3a818 Merge topic 'Coverage_CornerAnnotation' into master
90acce9f Merge topic 'fix_segfault' into master
b61991ae Merge topic 'TestClipPolyData-fix' into master
1b7facc9 Merge topic 'image-to-color-extension' into master
bd273ddc Merge topic 'add_image_base_filter' into master
ce554a58 Extend vtkImageMapToColors to support Mask color and Non Active Scalar input
fd4cb594 Merge topic 'Coverage_FiltersGeneral' into master
c6327c26 Merge topic 'Coverage_TestDataObjectIO' into master
82f8d3d8 Merge topic 'IOGeometry' into master
20ef3a0c Merge topic 'RenderingCore_NO_VALID' into master
bf70da00 Fixed error in vtkFiltersCoreCxx-TestClipPolyData test
5881e35a ENH: Add removed tests
9bce5da0 COMP: test require NO_VALID modifier
ce5bab01 COMP: Refactored TestDataObjectIO
b4e01469 ENH: Added tests that were removed during modularization
4603a7b4 Merge topic 'coverage-named-components' into master
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