Head piece to Staff of Ra for pencil

This is a remix of the magnificent model by youngs66. I scaled it down to 45% to fit on a pen or pencil and the details are still all there. In addition, I made a few minor changes:

- The headpiece is scaled to 45% in X-Z, but to about 71% in Y (front-to-back), to keep the walls from getting too thin around the slot for the staff mount. The corresponding tab on the staff mount is similarly thicker.

- The socket in the staff mount now goes nearly all the way up to the top of the model, s