added includes removing compiler errors caused by unknown (not fully declared) classes.
added includes removing compiler errors caused by unknown (not fully declared) classes.

neomonkeus/niflib,neomonkeus/niflib,neomonkeus/niflib,amorilia/niflib,niftools/niflib,niftools/niflib,niftools/niflib,amorilia/niflib