fix(scheduler): handle announcer timeouts to work around https://github.com/docker/docker/issues/8022
Merge pull request #1832 from gabrtv/announcer-timeout

fix(scheduler): handle announcer timeouts explicitly
chore(*): bump CoreOS to 435.0.0; Docker to 1.2.0; fleet to 0.8.0
refactor(scheduler): switch to fleet http api