Add the ability to install with Eager

[zackbloom]

Eager allows scripts like Typist to be installed by non-technical people. The install.json file informs Eager-like tools how the script should be installed, and what options to collect. In an effort to create a truly effortless install experience, we've also added some code around building the HTML syntax needed by Typist automatically.

This PR adds:

• A script to convert a list of variations into the appropriate Typist syntax
• An install.json file to let Eager-like tools install Typist
• A quick script to build files, which are now committed into the dist/ folder
• A blub about Eager in the readme

Thanks!