Add Github release support

[clamoriniere1A]

Fixes: #25

This project is using goreleaser and an additional script for releasing also the Helm chart.

For starting the delivery, you need to clone this repository, then:

zsh hack/release.sh <version> <remove-git>

a concreate example is: zsh hack/release.sh v1.0.1 upstream

This script will:

• generates locally the helm chart with the requested version.
• updates the helm repo index file (index.yaml) file with the new release.
• Adds commits and tag the repository with all change and the requested version.
• Push changeset and tag to the remote git repository.

[codecov-io]

Codecov Report

Merging #27 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #27   +/-   ##
======================================
  Coverage    23.4%   23.4%           
======================================
  Files           8       8           
  Lines         833     833           
======================================
  Hits          195     195           
  Misses        623     623           
  Partials       15      15

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[clamoriniere1A]

@sdminonne @EricMountain-1A Finally I was able to run the e2e test in travis-ci. In order to achieve it, I replaced the kubeadm-dind-cluster with minikube.