[needs-packaging] Add the 'mathtext' package to Ubuntu

I would like to add a program that I'm developing, mathtext, to Ubuntu's repository.

http://azabani.com/snippets/mathtext

mathtext allows you to write styled text where formatting is unavailable, such as Facebook and text-only fields. mathtext uses the "Mathematical Alphanumeric Symbols" Unicode block (0x1d400 - 0x1d7ff) where there's alphanumeric characters with styles such as sans, serif and italics. mathtext will read from stdin, writing the "translated" text to stdout after each line. You can pipe a file into mathtext to be translated, too.

mathtext also supports a "fullwidth" style that transposes characters 0x21 - 0x7e (basic 7-bit ASCII) to fullwidth charaters, as defined in "Halfwidth and Fullwidth forms" (0xff00 - 0xffef).