Update README.md to state that Go 1.3+ is needed

committed my test case accidentally :(

privileged existed for mounting

Performance optimizations and memory management

Go 1.2 is no longer supported (we use sync.Pool).

feat(docker) build a daemon

The default Docker build creates a daemon.

TODO allow bootstrap node to be overridden at runtime (perhaps with an
environment variable), so we can use custom topologies in test
environments. NB: We still want the default behavior to connect to Mars.

TODO create a docker image that mounts and uses shared volume to make
that mount accessible on the host.

fix(everything) log.Debug -> log.Debugf

cc @whyrusleeping

perf(core/datastore) disable snappy compression