modified docu, changelog

Changelog.md

 # Changelog
 
+## [1.1.0] - 2018-08-08
+### Added
+* `undeploy` command
+
 ## 1.0.0 - 2018-08-06
 * initial release
+
+[1.1.0]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.0.0...release%2F1.1.0

Readme.md

@@ -53,6 +53,21 @@ Depending on existing deployment with the same name either an installation or an
 
 Upgrades always recreate the pods. If the image is pulled depends on `imagePullPolicy` of the container specs.
 
+## deployer undeploy
+
+This command undeploys a deployment from a kubernetes cluster. The credentials are provided by the cluster-admin as well as the namespace and the service-account.
+
+```
+$ deployer undeploy \
+	--namespace example_namespace \
+	--cluster-url https://k8s-cluster.example.com:6443 \
+	--certificate-authority "$base64_encoded_cacert" \
+	--token "$base64_encoded_bearer_token" \
+	--name example-staging \
+	--service-account tiller-service-account
+```
+*undeploys deployment named *example-staging* from  namespace *example_namespace**
+
 # Advanced Configuration
 
 ## docker build
@@ -74,6 +89,16 @@ Upgrades always recreate the pods. If the image is pulled depends on `imagePullP
 * `--token`: sets the bearer token of the service-account as bas64-encoded string. This string is provided by the k8s-admin.
 * `--namespace`: sets the k8s-namespace where the deployment is located. This string is provided by the k8s-admin.
 * `--service-account`: this is the name of the service-account, that is used to perform the deployment. This string is provided by the k8s-admin
+* `--name`: sets the name of the deployment.
 * `--charts`: sets the path where the helm-charts reside.
 * `--set`: overrides the values from `Values.yaml` in the helm-charts. Provide multiple `--set`-options if you want to provide multiple overrides.
 * `--set-string`: overrides the values from `Values.yaml` in the helm-charts as string. Provide multiple `--set-string`-options if you want to provide multiple overrides.
+
+## docker undeploy
+
+* `--cluster-url`: sets the url to the kube-apiserver. This URL is provided by the k8s-admin.
+* `--certificate-authority`: sets the certificate-authority certificate as base64-encoded string. This string is provided by the k8s-admin
+* `--token`: sets the bearer token of the service-account as bas64-encoded string. This string is provided by the k8s-admin.
+* `--namespace`: sets the k8s-namespace where the deployment is located. This string is provided by the k8s-admin.
+* `--service-account`: this is the name of the service-account, that is used to perform the deployment. This string is provided by the k8s-admin
+* `--name`: sets the name of the deployment.