Since we're aiming for consistency across the codebase, I believe it
includes a uniform way to refer to the creatures this game consists of
in the labels of the code.
The only exceptions to this rule are labels referring to things named
through the use of the <PK><MN> or <PKMN> characters, in which case PKMN
is used.
Most of this was already consistent enough™, I just picked the
convention with the most occurences and fixed the outliers.
Rename MORN/DAY/NITE to MORN_F/DAY_F/NITE_F; use MORN/DAY/NITE for shifted values (cleaner for person_events)
Prefix FLOOR to the `elevfloor` constants
The HAPPINESS_TO_EVOLVE constant is what's supposed to be used to give the number for when a Pokemon should evolve by happiness. The constant was not put in place so it is never used, instead the original 220 was put.
