Change Ability array to IReadOnlyList, add method to check ability index in personal data
Suppress some message warnings
Change EvolutionChain short-circuit for VC to jump from gen6 directly down to gen2. There aren't any notradeback 1 situations, so a notradeback1 will always start with g=1, so no need for the other if-continue.
Simplify pk5 conversion
reduces loading time (don't have to allocate conversion arrays when
launching a gen7 game), and separates things to easier to manage
locations
reworks gen3 string encode/decode, no longer does 3->4->5 and 5->4->3;
instead goes straight to the end result without an intermediary format.
String sanitization should probably be broken up rather than reused, oh
well.
