2+2 S roadmap

2+2S roadmap:

DELETE
- delete 4-S
- delete 2-S

REMOVE
- remove all secret slots (-5)

ADD
- add pit of 100 trials pt 2 (as *new* 4-E)

CHANGE
- move pit of 100 trials pt 1 (as 4-x, 4-7 probably)
- chnage 5-8 into 4-4 vanilla clone w/ 4 keys required from each room
- add "5-4 skip" in 3-8
- further enhance "5-4 skip" in 5-6