Using stored fall speed down through a vertical door

[blkerby]

Using a moonfall with stored speed is already modeled for clipping down past a (possibly locked) door shell. Using that stored speed to clip through something else in the next room is not yet modeled. Possible applications that are currently known:

• Oasis: clipping down past the bomb blocks
• Glass Tunnel: clipping past the entire tube
• Aqueduct: clipping past the bomb blocks

Some research is needed to figure out the range of possible speeds that will work in each of these instances. It also requires working out the range of possible speeds with which one can exit with setups in the room above. We'll then need a way of modeling this in the schema, e.g. using a new entrance/exit condition pair.