GitLab

More support for funky memory things.

For now the devmem command comes in handy, but probably generally good to have.

Remove the ubuntu1804 image. Base only has basic tools, no build tools
or libraries. Install build deps in nopaxos, mtcp, and tas images.

This speeds up base image build significantly

Just run different scripts inside. This avodis lots of duplication in
the jsons.