Updated vtk point picker

Change-Id: I673f82569736d9249affa08ee6eb78465deb4b15
Added support for rendering when clipping by near plane

Change-Id: Ibe45190687c1dc4db5dad19b84c0baca8d09bbb6
Fixed volume geomety not updated

Change-Id: Iecbd96717063522378e40a605e65ab6c361d3a78
Using smallest possible delta to offset precision issues

Change-Id: I14cfd14ecb65786539e932dd281e9a2fa6c73a3b
Fixed release graphics resources

Change-Id: I7043207b1b260ad4b7865f6247045149ca2fa81a
ENH: Additional tests for new volume mapper

Change-Id: I545dba94bcfbaeea7bd855b3bad83f9b13bc9824
Remove unused variable.

Change-Id: I8185786ef250739449cde7a49985768d01574245
Merge topic 'uvcdat-sync' into master

25a270dd Remove unused variable.
949b8620 Updated vtk point picker
ENH: Added baselines based generated using old volume mapper

Disabled TestGPURayCastCropping1 to be fixed later.

Change-Id: I643d17283ca67104cc0abe52e5079dbb3508616d
Merge topic 'new_volumerenderingtests' into master

7e69bad4 ENH: Added baselines based generated using old volume mapper
52f78f2d ENH: Additional tests for new volume mapper
Merge topic 'volume_clipping_updated' into master

d2d49e01 Fixed release graphics resources
9dbe622e Using smallest possible delta to offset precision issues
4c9403a3 Fixed volume geomety not updated
14800322 Added support for rendering when clipping by near plane