Rearrange BoxedClass members to reduce size slightly (8 Bytes)

Type specialice more runtime methods

Whoops. register specialiced int functions correctly

Type specialice buildin math support

add listAppendArrayInternal which appends an array of elements to a list

Except for the few that were actually working, which became
normal tests again.

Implement string.split(sep)

TraceStack: when visiting a range preallocate the elements.

Fix wrong if check: causing allocs smaller than 16byte to end up in the 32byte bucket

Improves performance of raytrace.py from about 10secs to 7secs.

Doing it "right" is more complicated than I thought,
so it's a little bit hacky right now.