added embed and fontdir based on fontname.

hi agentk,

based on grunt-webfont i've added embed base64 for woff and ttf based on the embed option.
a second thing i've changed: the folder structure:
it's now based on the font name

lets say this config ...
    build: {
      options: {
        path_prefix: '../fonts/',
        stylesheet: 'fonts/fonts.css',
        embed: ['woff', 'ttf'] // or false | true | woff | ttf 
      },
      files: [{
        src: ['/fonts/*.{otf,ttf}'],
        dest: 'app/fonts'
      }]
    }

... gives us
/fonts/Arial.otf
and 
/fonts/Helvetica.ttf

this will lead to
app/fonts/Arial/Arial.(eot, svg, ...)
app/fonts/Helvetica/Helvetica.(eot, svg, ...)

hope u like it, or can use parts of it :)

regards
iham