Halyard 0.0.2

Refactor naming of components (#89)

This clears up the abstraction quite a bit. The model now looks like
this:

There are a number of Artifacts (like a docker image or debian), which
each expose an Endpoint (like the Clouddriver REST interface), and can
be extended via a Profile (like gate-googleOAuth.yml). Previously these
were all named "component", making things needlessly confusing.