add endpoint for CreateIntegrationBoard

This adds the endpoint to create an integration board.

It's not ready to be pulled yet, though.

@reverentgeek can you check out where I commented out the proxy stuff?  I could not get it to work on my mac, talking to the kanban app on my vm, and that fixed the issue.  I suspect it won't work when run locally, though. We need to think about making that configurable.

I'll have the server side stuff pushed shortly and will let you know when it's ready.