8044638: Tidy up Nashorn codebase for code standards
Reviewed-by: lagergren, sundar

8035836: Array performance improvements
Summary: Implement typed arrays with native byte buffers and do fast linking for all continuous arrays
Reviewed-by: attila, jlaskey, sundar, hannesw

8006408: Clean up and specialize NativeString
Reviewed-by: jlaskey, lagergren