Add production deployment process

[codingjoe]

We need to have a management command to deploy the Heroku Connect configuration on production. This command should be ether callable during the release or or compile phase of a dyno or be hooked to the pre_commit hook.

Caveat: pre_commit is called per app!

[syphar]

@codingjoe are you perhaps talking about pre_migrate?

[codingjoe]

@codingjoe are you perhaps talking about pre_migrate?

haha, yes :P