This moves the various projects from "type-based" folders (such as
"services" or "tools") into more appropriate semantic folders (such as
"nix", "ops" or "web").
Deprecated projects (nixcon-demo & gotest) which only existed for
testing/demonstration purposes have been removed.
(Note: *all* builds are broken with this commit)
Adds a tiny program that keeps a checkout of a remote git repository
in sync with a folder on the local filesystem.
This is going to be used to mirror the GCSR repository onto a local
disk for cgit serving.
