Add "full" Latin character set to test font.
Add "full" Latin character set to test font.

As mentioned in #198 OS X requires a more or less complete set before it
calls it a "Latin" font and shows it in font selection menus like
TextEdit. Here we've added the required set, which is .notdef, a-z, A-Z,
0-9 and space.

moyogo/opentype.js,brawer/opentype.js,moyogo/opentype.js,brawer/opentype.js,googlefonts/opentype.js,Jolg42/opentype.js,axkibe/opentype.js,nodebox/opentype.js,fpirsch/opentype.js,axkibe/opentype.js,googlefonts/opentype.js,nodebox/opentype.js,fpirsch/opentype.js,Jolg42/opentype.js