Add updated Janitor template using official meltwater/docker-cleanup

container image rather than the temporary patched version
Some fixes to the README documentation to help clarify behaviour and fix
typos.

templates/janitor/2/docker-compose.yml

@@ -0,0 +1,18 @@
+cleanup:
+  image: meltwater/docker-cleanup:1.6.0
+  environment:
+    CLEAN_PERIOD: ${FREQUENCY}
+    DELAY_TIME: "900"
+    KEEP_IMAGES: "${KEEP}"
+    KEEP_CONTAINERS: "${KEEPC}"
+    LOOP: "true"
+    DEBUG: "0"
+  labels:
+     io.rancher.scheduler.global: "true"
+     io.rancher.scheduler.affinity:host_label_ne: "${EXCLUDE_LABEL}"
+  privileged: true
+  tty: false
+  stdin_open: false
+  volumes:
+    - /var/run/docker.sock:/var/run/docker.sock
+    - /var/lib/docker:/var/lib/docker

templates/janitor/2/rancher-compose.yml

@@ -0,0 +1,31 @@
+.catalog:
+  name: "Janitor"
+  version: "v1.6"
+  description: "Docker cleanup"
+  uuid: janitor-2
+  questions: 
+    - variable: "FREQUENCY"
+      label: "Frequency"
+      description: "Run the cleanup on a cycle of this many seconds"
+      default: 3600
+      required: true
+      type: "int"
+    - variable: "EXCLUDE_LABEL"
+      label: "Exclude label"
+      description: "Specify a Rancher host label here that will be used to determine on which hosts the Janitor container should not deploy."
+      default: janitor.exclude=true
+      required: true
+      type: "string"
+    - variable: "KEEP"
+      label: "Keep images"
+      description: "A comma separated list of images that should never be removed. These are left-anchored Bash Shell Wildcard patterns."
+      default: "rancher/"
+      required: false
+      type: "string"
+    - variable: "KEEPC"
+      label: "Keep containers"
+      description: "A comma separated list of images that should never have stopped containers removed. These are left-anchored Bash Shell Wildcard patterns."
+      default: "*:*"
+      required: false
+      type: "string"
+