Adding MIT license.
Merge pull request #1 from trygveaa/re-exec

Add support for re-exec without loosing IRC connection
Using readable_github_webhooks from Github.
Cleaning up the receive events process a bit.

The code of itera-bot now knows very little about the events it
receives. It will mostly just query the Renderer and ask if it can
render the received event. The exception to this is for push-events, as
we don't want to notify about empty pushes.
Adding logging of received events.