Fusion: hos_SplitEXR 1.8

Moved hos_SplitEXR to github, which might make updating script a whole lot easier. Increased to version 1.8 which hopefully fixes some long standing issues. Hopefully fixed file = nil error some people experienced. Made sure we create a new Loader by using comp.Loader, rather than Loader (which doesn’t seem to work in Fusion 9) Get…