addressing second round of review comments, to be squashed.

Signed-off-by: Imran Pochi <imran@kinvolk.io>

CHANGELOG.md

@@ -23,7 +23,7 @@ This release packs new features and bugfixes. Some of the highlights are:
     `t1.small.x86` are EOL and no longer available in new Packet projects
     ([#612](https://github.com/kinvolk/lokomotive/pull/612)).
 
-  If you haven't explicitly defined the controller_type and/or
+  **WARNING**: If you haven't explicitly defined the controller_type and/or
   worker_pool.node_type configuration options, upgrading to this release will
   replace your controller and/or worker nodes with c3.small.x86 machines. To
   avoid this, set these configuration options to the desired values.
@@ -61,8 +61,9 @@ component](https://github.com/kinvolk/lokomotive/blob/v0.3.0/docs/configuration-
 ([#649](https://github.com/kinvolk/lokomotive/pull/649)). This allows managing
 and configuring Ceph using toolbox pod.
 
-- Add `external_labels` for federated clusters. This helps to identify identify
-    metrics queried from different clusters.
+- Add Prometheus feature `external_labels` for federated clusters to Prometheus
+    operator component. This helps to identify identify metrics queried from
+    different clusters.
     ([#710](https://github.com/kinvolk/lokomotive/pull/710)).
 
 #### Docs
@@ -98,15 +99,9 @@ and configuring Ceph using toolbox pod.
 
 #### Development
 
-- Disable marking releases as `pre-releases` ([#678](https://github.com/kinvolk/lokomotive/pull/678)).
-
-- Do not show release values in terraform output
+- Do not show Helm release values in terraform output
     ([#627](https://github.com/kinvolk/lokomotive/pull/627)).
 
-- Change NewClientset to create Kubernetes Clientset from kubeconfig file
-content, instead of from file path
-([#628](https://github.com/kinvolk/lokomotive/pull/628)).
-
 - Remove provider aliases from go templates
     ([#617](https://github.com/kinvolk/lokomotive/pull/617)).
 
@@ -171,7 +166,7 @@ component "prometheus-operator" {
   .
   .
   prometheus_metrics_retention = "14d"
-  prometheus_external_url      = "https://api.example.com/prometheus"
+  prometheus_external_url      = "https://prometheus.example.lokomotive-k8s.net""
   prometheus_storage_size      = "50GiB"
   prometheus_node_selector = {
     "kubernetes.io/hostname" = "worker3"
@@ -208,7 +203,7 @@ component "prometheus-operator" {
 ```
 
 Check out the new syntax in the [Prometheus Operator configuration
-reference](https://github.com/kinvolk/lokomotive/blob/v0.2.0/docs/configuration-reference/components/prometheus-operator.md)
+reference](https://github.com/kinvolk/lokomotive/blob/v0.3.0/docs/configuration-reference/components/prometheus-operator.md)
 for details.
 
 ##### Upgrade steps
@@ -451,7 +446,7 @@ This is a patch release to fix AKS platform deployments.
 
 #### Misc
 
-* Bootkube Docker images are now pulled using Docker protocol, as quay.io plans to deprecate pulling images using ACI ([#656](https://github.com/kinvolk/lokomotive/pull/656)).
+* Bootkube Docker images are now pulled using Docker protocol, as quay.io plans to deprecate pulling images using ACI ([#656](https://github.com/kinvolk/lokomotive/pull/656).
 
 #### Development