Describe: describe events for a given pod

[adietish]

related to #553

kubectl describe pod <name> lists events for the pod it is describing.
The current implementation in #553 is missing this.

Events:
  Type     Reason            Age                 From               Message
  ----     ------            ----                ----               -------
  Warning  FailedScheduling  9h (x108 over 18h)  default-scheduler  0/1 nodes are available: 1 node(s) didn't match Pod's node affinity/selector. preemption: 0/1 nodes are available: 1 Preemption is not helpful for scheduling..
  Warning  FailedScheduling  35s                 default-scheduler  0/1 nodes are available: 1 node(s) didn't match Pod's node affinity/selector. preemption: 0/1 nodes are available: 1 Preemption is not helpful for scheduling..