worklist/hifi — pull request #265 by ZappoMan (2013-05-10 00:10:41+00:00)
Title: Optimized Voxel Rendering Performance by implementing blended VBO strategy

- Introduced concept of sometimes only updating the new/changed part of the VBO while other times updating the full VBO. This allows us to get the speed advantage of only partial VBO updates when nodes haven't been removed

- added cleanupRemovedVoxels() which actually deletes the nodes that were previously removed (fixes a memory leak!!)