Update etcd/raft submodule.

No major changes here, just catching up the branch before some
bigger changes land.
Fuse bootstrap.sh and Dockerfile...

...and added environment variables that show RocksDB the way to our vendored versions of snappy and gflags.
 rebase in progress; onto 08afd18
move dnsmasq to our repo; reorganize
update CircleCI to new base Docker image
Merge pull request #157 from bdarnell/submodule

Update etcd/raft submodule.
address @spencerkimball's feedback
`make acceptance` for CircleCI & better local cluster
have CircleCI cache dnsmasq for `make acceptance`
CircleCI: Hack to manually set timestamps and get Docker to cache
Merge pull request #159 from tschottdorf/dockerfix

Shared build process for bootstrap.sh and Docker...