buildbot config for zerocash

This should have all of the config for our buildbot except secrets.

Deployment

For deploying updates, this works for many changes (esp. only to master.cfg):

1. On ci.leastauthority.com become the user bbmaster. The following steps all assume that user.
2. cd ~/bbotzc ; git pull --ff-only ; cd ~
3. cp ./bbotzc/master.cfg ./buildbot/master.cfg.
4. buildbot restart ./buildbot

Other changes may require more complicated deployment, eg if they: change dependencies, require altering the buildslave in some manner, introduce/move credentials files, add more files besides master.cfg...

Perhaps someday we'll have a better deployment story.

Deployment Tests

You can experiment/test deployment to some degree with Docker. (on debian: apt-get install docker.io)

$ docker image build -t bbotzc .
$ docker run bbotzc

At that point you can interactively experiment with the daemon, but note it will have important differences from our production deployment.