Start of Lua support

Use http::Response for constructing replies

Relicense under AGPLv3

Remove redundant HTML escaping helpers.

Increment version number to 0.1.1

Create plain theme, do some escaping, fix some busted envvars, document themes.

lots of stuff. theming basically done, added some logging, frontend basically done.

add GPLv3, update manifest

config done

fix packages, implement caching

API deserialization structs