added 'scoped_run' that takes isolate, optional context, and a callable and runs the callable in an isolate, handle, and (if possible) context scopes
added 'scoped_run' that takes isolate, optional context, and a callable and runs the callable in an isolate, handle, and (if possible) context scopes

xaxxon/v8-class-wrapper,xaxxon/v8toolkit,xaxxon/v8-class-wrapper,xaxxon/v8-class-wrapper,xaxxon/v8toolkit,xaxxon/v8toolkit