Also fix bitrot:
* The 'f' key triggers a profile, after which all bets are off regarding time-dependent behavior such as lifetime and update().
(I'm moving space-invaders "fire" to the space bar as a work-around.)
* You don't get a collision without
a non-default shapeType property (if the object type is "Model")
a truthy collisionsWillMove property
* Entity handles (such as returned by Entity.addEntity) no longer have a separate 'id' property, so don't reference that. Just use the handle object itself.
* When an entity's lifetime expires, Entities.getEntityProperties(theEntityHandle) returns default values.
It looks like the space-invaders script was written at a time when this returned falsey.
(I'm changing the script to see if the properties.type === 'Unknown'.)
NOT FIXED is that the level of detail is cutting out when showing all the invaders.
