Instruction on how to update the default kube scheduler

[brokenmass]

Is this a BUG REPORT or FEATURE REQUEST?:
FEATURE REQUEST

What happened:
readme states You can either update the default kube scheduler to use stork or start a new scheduler instance which can use stork.

What you expected to happen:
Would like to have more information about the required changes

[disrani-px]

@brokenmass Please review the PR and let me know if those instructions look good.

[brokenmass]

looks good. just one more question. I think it's also required to change the system:kube-scheduler clusterrole and add to the rules

- apiGroups: ['']
  resources: ['configmaps']
  verbs: ['get']

[disrani-px]

Added the permissions to the instructions