Support CircleCI build

[jhmartin]

It can be difficult to trust that the artifact stored on a Git release is the artifact built by that commit. EVE being as hard-core as it is, the risk of a trojan is above nil. By building the application in a visible CI tool we can be more confident the result is based on the code.

Further, this allows someone to fork the repo and create a build of their own (using CircleCI) without locally installing development tools.