v30

• "b", "d" have rounded corners
• "b", "d", "h" have regular x-height
• improve shape of parens
• add several glyphs:
  • math: symbols for set of complex, natural, rational, real, integer numbers; multiline braces, summation, radical, etc.; partial differential; centered asterisk; subset of or equal to; etc.
  • misc: interest (mac command symbol);
  • braille