Base16 themes now available

I created a [base16 template](https://github.com/niklaas/base16-blink) and the corresponding [colours for blink](https://github.com/niklaas/base16-blink/tree/master/colors). You can read more [about base16](https://github.com/chriskempson/base16) and [its build mechanism](https://github.com/chriskempson/base16/blob/master/builder.md).

Feel free to add the themes to this repository/the gallery. I would love to provide screenshots but it's a lot of them. Maybe you can create the screenshots with a script? That said, previewing the themes is possible over here: https://chriskempson.github.io/base16 .

Review the linked base16 template and Blink colour files, then inspect this repository's theme gallery structure to determine how themes are added. Add the available Base16 themes to the gallery; screenshot generation is suggested but not required by the issue.

Written by the indexing model from the issue text.