Upgrade Elasticsearch to version 5.3.0.

Signed-off-by: Paulo Pires <[email protected]>

Update documentation and descriptors.

Signed-off-by: Paulo Pires <[email protected]>

Added NODE_NAME variable with pod as source (pires#82)

Updated instructions to match Elasticsearch 5.2.0.

Use new, much smaller container image that relies on DNS discovery ra…

…ther than using a 3rd-party plug-in.

Fixes pires#68
Refs pires#69

Upgraded Elasticsearch to version 5.1.1.

Upgraded Elasticsearch to version 5.0.1. Fixes pires#60

Upgraded Elasticsearch to version 2.4.1 and Kubernetes to 1.4.3.

Using quay.io/pires/docker-elasticsearch-kubernetes in order to enabl…

…e configuration of minimum master nodes.

Upgraded Elasticsearch to 2.3.5.