extract EncounterStatic match determination; in doing so fixes "lvl" by
passing byval.
Pichu encounters (2) come before the Gift level 25 pikachu, causing lvl
to be dropped to 5. When pikachu comes around, it compares 5==25 -> bad;
pulling out the method and passing byval allows it to be 25 at the start
of every new encounterstatic checked.
move MarkEncounterTypeData back above the area size reduction so that
the mark-by-locationID special handling will work
prevent slottype from becoming overwritten if already defined by special
case handling
add examples provided to automated test cases
closes#1648
