Fixes #29, #17, #18, #19, #20, #21.

Cleanup after 3b14d114e6c02ad827a2af5d004ee5ab8c9aec5c.  Updated switch
and systems plans, updated references and labeling, cleaned up locations
on S05-P01, removed excess ammeter shunts, relabeled switches, relays,
and shunts.