Beta Release 2

After running 1.0.0-beta.1 through SAU/CAL QA Team, we've found a bunch of issues around accounts that had some sort of activity before attempting the onboarding for the first time:

• #160, #155, #161, #165, #180, #181 Are all issues related to our teams testing with the same accounts over and over again, and the plugin not handling these scenarios properly. Most of these are closed by PR #182.
• #179 exposes a race condition that happens when the feed is not yet generated by the time Pinterest attempts to access it. This is addressed by PR #164.
• #154 exposes an issue that happens when the domain verification takes a bit of time. In order to work around these issue, we’ve implemented a delay between retries (currently 3 before displaying the error seen on the issue) of 5 seconds in PR #156.

This beta should be considered deliverable to the Closed Beta Program that Pinterest is running.