* Add comments for maintenence.

* Fix not-guaranteed-to-be-set-to-zero-ness of sparklloop
* Add blackrock sparkles to good ending.
* Don't have emerald sparkles be randomised.
* Adjust credits to include Sal (credits sprites + four merged internal MRs and a bunch of public ones) and a few other known contributors, plus remove oni's name (he requested i do it a whiiile ago)