Upgrade to new harold auth method and allow TLS.

This updates the harold configuration in tallier to allow for HTTPS, path prefixes, etc. Additionally, it updates to the new github-like authentication style that harold [recently gained support for](https://github.com/spladug/harold/commit/69f32a2004fb00f3ef1910bb71b7b39e06315483).

:eyeglasses: @rram 

(anyone else interested in reviewing this? :)