Add optional deployment annotations

[lobis]

Closes #250

Via annotations one can configure reloader to reload the related service whenever a change to a secret or configmap happens:

  deploymentAnnotations:
    reloader.stakater.com/auto: "true"

By default deployments will be reloaded whenever any secret/map mounted on them is changed. This can be configured with great granularity via annotations either in the deployment or secrets (you only want to reload whenever one particular secret changes, etc.). I think the default behaviour is good enough.

Via this strategy the server will reload whenever the policy package is updated, or daemons will reload whenever the certificate is updated by the cronjob.

[rdimaio]

LGTM - would be useful if the deploymentAnnotations: {} in the values files also had an example of how some sample annotations would need to be added in order for this to work (e.g. if i want to add 2 annotations, do i need to prefix them with a dash?)

[lobis]

LGTM - would be useful if the deploymentAnnotations: {} in the values files also had an example of how some sample annotations would need to be added in order for this to work (e.g. if i want to add 2 annotations, do i need to prefix them with a dash?)

I added some comments showcasing usage.