Adding schedule command to schedule cron jobs.

Adding example of a cron job.

Removing functions since they've been moved elsewhere.

test/hello_world_cron.yaml

@@ -0,0 +1,28 @@
+---
+environment: "prod"
+role: "vagrant"
+name: "hello_world"
+cpu: 0.09
+ram: 64
+disk: 128
+instances: 1
+cronSchedule: "*/1 * * * *"
+cronCollisionPolicy: "CANCEL_NEW"
+thermos:
+  - name: "bootstrap"
+    cmd: "echo bootstrapping"
+  - name: "hello_gorealis"
+    cmd: "echo hello world from gorealis; sleep 10;"
+updateSettings:
+  maxPerInstanceFailures: 1
+  maxFailedInstances: 1
+  minTimeInRunning: 1m
+  rollbackOnFailure: true
+  instanceRanges:
+    - start: 1
+      end: 4
+  blockIfNoPulseAfter: 1m
+  slaAware: false
+  strategy:
+    name: Batch
+    groupSize: 2