Fix jshint nits
Split addModelToScene into addOuluModelToScene and addcolliderModelToScene parts
and change some ambiguous variable names.
Unloading now results in most memory being reclaimed according
to Chrome task manager
Merge (tool) memexperiment and cull branches
Merge (manual) addColliderModelToScene
Fix false blockCount/buffer
Add unloadAssets to cull()
Add collider support