1.1.0

1. Add visibility & enable option for toolbar icons

showIconClose(boolean showIconClose);
disableIconClose(boolean disableIconClose);
showIconBack(boolean showIconBack);
disableIconBack(boolean disableIconBack);
showIconForward(boolean showIconForward);
disableIconForward(boolean disableIconForward);
showIconMenu(boolean showIconMenu);
disableIconMenu(boolean disableIconMenu);