Dispose of removed geometries and materials
Move material.map conditional
Derp.
Renamed disposeGeometries to disposeObject
Merge pull request #352 from virtual-world-framework/branch/dispose-graph

Dispose of Graph Geometries and Materials
Merge branch 'mars-game-staging' into dds_gltf
revert change to animation.vwf
fix animation system to avoid cases where the animation duration is 0 falsey