Rebuild fonts with full charset (NOT -allglyphs)

[HifiExperiments]

Closes #1169

ok so what happened here was:

• I put up Text Entity Improvements #937 April 16th. I did not specify any charsets or glyph ranges when creating the fonts, which unbeknownst to me meant they only included a very basic sets of 95 characters, while the original Hifi fonts evidently had more included
• https://github.com/Chlumsky/msdf-atlas-gen/releases/tag/v1.3 was released on June 1st, with support for -allglyphs
• BUT it turns out -allglyphs mangles the property that I treat as the unicode value (How do I output all glyphs, but with the "unicode" field included in the JSON where appropriate? Chlumsky/msdf-atlas-gen#91 (comment))
• instead, you can generate full charsets by creating a file charset.txt which is just a single line with [0x0,0xFFFF] and doing: msdf-atlas-gen.exe -font Roboto-Regular.ttf -type mtsdf -fontname Roboto -format png -arfont Roboto.arfont -charset charset.txt

I have regenerated our fonts using this command, and they now properly include Cyrillic characters and much more

[ksuprynowicz]

Works perfectly: