New build system (3.0)

[thisisaaronland]

Placeholder issue to revisit and update the current build system for non-weblog content. Things this needs to do:

0. Markdown all the things.
1. Merge (remove) the distinction between content and pages and components.
2. Fetch and build lists from source GitHub repositories: sources, properties, etc.
3. Ensure that the tooling for #2 is built in such a way that it can be wired up to GitHub webhooks to be run automatically when source repositories are updated.

Ideally it should:

• Share templates and tooling with blog. This would mean a) tooling is written in Go b) existing blog tooling would not be immediately portable since it assumed YYYY/MM/DD. So maybe Go is not best?

Perennial problems with these sorts of things:

• Nav bars and side bars

[straup]

Investigate this:

https://github.com/docuowl/docuowl

[thisisaaronland]

Investigate this:

https://github.com/roblillack/tack