kubernetes-mixin release-0.4 is only supported by 1.18+

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

This readme update includes two changes:
 1) Update the kubelet config requirements to mention the modern (non-deprecated) kubelet configuration values that can be used in place of the flags
 2) Update the compatibility matrix to mention the issue running release-0.4 on kubernetes versions 1.16.2 through 1.16.4, including a workaround.

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Co-Authored-By: Lili Cosic <cosiclili@gmail.com>

Replace Usage section reference to Customizing Kube-Prometheus section.

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

https://github.com/coreos/kube-prometheus/pull/425#pullrequestreview-368779890

Fixes #435

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Update the kubectl apply commands in the customizing section to match those the quickstart section. The customizing section did not account for the recently introduced setup/ subdirectory.

Pick up new alerts for unreachable nodes.

* Avoid race condition when deploying quickstart example

The namespace and CRD creation must happen before any dependent objects
are created.  So we can put these in a separate directory (manifest/setup)
so they can be created before the other objects.

Some minor updates to the README and added a couple of scripts
for the quickstarts

Update travis script to avoid race condition

Signed-off-by: Paul Gier <pgier@redhat.com>

* simplify the example quickstart script and improve readme

Signed-off-by: Paul Gier <pgier@redhat.com>

* increase minikube memory to 6g for quickstart example

the addonresizer could lead to problems with the kube-state-metrics
it is also removed from the ksm maintained kubernetes manifests
https://github.com/kubernetes/kube-state-metrics/pull/750



Signed-off-by: Guus van Weelden <guus.vanweelden@moia.io>

In the **Adding additional namespaces to monitor** section I appended a note showing the need for ServiceMonitor when adding additional namespaces... 

see: https://github.com/coreos/prometheus-operator/issues/2557#issuecomment-498996568

* Update Prometheus, Node Exporter & Grafana

* Update Prometheus to 2.10.0

* Add generated manifests

* Update lock reference to git sha

* Retrigger Travis

Per coreos/prometheus-operator#2519

Fix go get jsonnet command.