anchor: Font:hasGlyphs
  Gets whether the Font can render a character or string.
  hasglyph = Font:hasGlyphs( text )
  text string A UTF-8 encoded unicode string.
  hasglyph boolean Whether the font can render all the UTF-8 characters in the string.
  hasglyph = Font:hasGlyphs( character1, character2 )
  character1 string A unicode character.
  character2 string Another unicode character.
  hasglyph boolean Whether the font can render all the glyphs represented by the characters.
  hasglyph = Font:hasGlyphs( codepoint1, codepoint2 )
  codepoint1 number A unicode codepoint number.
  codepoint2 number Another unicode codepoint number.
  hasglyph boolean Whether the font can render all the glyphs represented by the codepoint numbers.