standard generation 3 pkm content & interactions
generic inter-converter (more efficient than reflection)
update conversion methods; specific format conversion is now in the
object's src file now.
may be worth doing for gen4 pk4<->bk4
remove legality check's use of reflection which checked individual
properties; add interfaces to interact with the ribbons of each PKM
type. With this, every ribbon attribute is accessible via its
corresponding interface (cast)
will have to add checks for individual interfaces as per #1250
I didn't feel like adding much documentation, is pretty straightforward.
Cast a pkm object to the desired ribbon set; if not null, can access
ribbons regardless of pkm format.
