Address U. F. O. shortcomings.

This attempts to address a number of issues mentioned in #1653, specifically the dropping of version data, the changing of glif names, and the reversal of reference and anchor orders. It also enables layered U. F. O. output in certain limited contexts outside of the specification.

I thought that it made it easier for somebody to infer the X. M. L. tag resulting from that line at a glance. It would almost certainly be optimized out at compilation.