Added event payload and change in custom header to avoid mixed up with
the auth headers.
Merge pull request #25 from mechatama/webhooks-docs-event-payload

Added event payload and change in custom header to avoid mixed up with the auth headers.
Added more emphasis on the face that application needs a single access_token per store
Merge pull request #26 from mechatama/webhooks-access-token

Added more emphasis on the face that application needs a single access_token per store
Deprecating this repository