Improved Instancer bound hash computation.
Improved Instancer bound hash computation.

It now correctly combines the hashes for each instance, rather than actually computing the bound prematurely. This gives an approximately 15% speedup in a simple benchmark.

johnhaddon/gaffer,boberfly/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,goddardl/gaffer,hradec/gaffer,ivanimanishi/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,boberfly/gaffer,chippey/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,hradec/gaffer,goddardl/gaffer,goddardl/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,hradec/gaffer,boberfly/gaffer,boberfly/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,goddardl/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,appleseedhq/gaffer,appleseedhq/gaffer,cedriclaunay/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,appleseedhq/gaffer,chippey/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,appleseedhq/gaffer,cedriclaunay/gaffer,lucienfostier/gaffer,cedriclaunay/gaffer,cedriclaunay/gaffer,ImageEngine/gaffer,hradec/gaffer,hradec/gaffer,chippey/gaffer,chippey/gaffer,johnhaddon/gaffer