Adds ability to target :active pseudo-class for $all-text-inputs
Refactors contains functions

- Supports LibSass
- Closes #587
Refactors is-num function

- Closes #584
Fixes bug in the new font-face mixin

- Fix format of ttf files to truetype
- Remove EOT src that didn’t have iefix query
- Use double quotes
- Fixes #594