allow user to specify font famliy and weight in config.yml
Revert custom fontweight. This breaks ie9.

Not entirely clear about why this breaks things, but IE9 does not like the custom weight value. Since icons don't really have a weight it's probably not necessary to customize this.
Also remove the fontweight data from being passed to svgFontTemplate
Merge pull request #1 from cameronmcefee/custom-data

Fixed font template (font famyly) + code cleanup