First shareable beta version

Over the last couple of days I fleshed out the documentation, created a Docker image, and set up Travis-CI for continuous integration. Today I introduced a few teammates to the code. Until now I've been the only one using the code; but now I'm marking the current version as beta to show that it's ready to be used by others.

Ideally I imagine the code being reviewed and successfully used by at least one other user before I'd want to label a release as v1.0.0.