Mobile support

[ineffyble]

I'm not sure how often your users will be on mobile, but as a minimum step, adding the appropriate HTML tags to set the viewport and show the site responsively would help people visiting via mobile see the site and how it works.

To let it work on mobile, you'd need to support a file select mechanism other than drag and drop.

[mattriley]

Thanks Effy, I'll keep this in mind when I get to mobile.