Add free NATS/gnatsd service plan
Add Etcd 0.4.6 free service plan

Etcd has no support for username/password authentication.
Nicer dashboard_client id/secret
Primary port selected for etcd

Credentials look like:

    "credentials": {
      "hostname": "10.3.2.6",
      "port": "49163",
      "uri": "etcd://10.3.2.6:49163"
    },

The port maps to `4001/tcp`; there is also `7001/tcp`.
Etcd persistent volume config
Add consul free service plan.

The bound port is for the HTTP endpoint (8500/tcp).

There are other ports available:

    Client Addr: 127.0.0.1 (HTTP: 8500, DNS: 8600, RPC: 8400)
    Cluster Addr: 192.168.1.43 (LAN: 8301, WAN: 8302)

See http://www.consul.io/docs/agent/basics.html
Add rethinkdb 1.14.0 free service plan

Rethinkdb does not offer user/pass authentication.

Primary port is the TCP service port.
Merge pull request #9 from drnic/nats

Additional service plans