Use UnifontEX as Unifont version for Plane 1

[stgiga]

I made a fork of GNU Unifont (UnifontEX) that merges Plane 0 and Plane 1 as best as possible (Unifont-JP 15.0.06+15.1.01 plus 11.0.01 Upper. Right now the limits are largely from font software.) Regular Unifont doesn't do this nor does it support nearly as many formats.

Plane 1 has stuff like many historic Indic scripts, emoji, fancy letters, and other interesting things. I'm at 65422 glyphs right now, which still fits in 16bit/DBCS. I'm at the maximum that I can currently properly achieve at this point in time.