Adding LOTS of scripts

[davelab6]

@lemzwerg is adding support for a LOT of scripts to ttfautohint; I'd like him to contribute hint testing pages to this project (ie, font cascades for relevant sizes)

The Noto demo texts for the many scripts are available at https://github.com/googlei18n/nototools/tree/master/sample_texts and I suggest to use those as a start.

@impallari how can this be done in a way that you'll accept upstream? :)