GoodData announcement

Pull request for https://trello.com/c/JKSlCxNP
Should this start:

We consider the risk of exposing production data **unacceptable**. 

> (sorry, not exactly clear on all the underlying issues). If it is about the tokens, then I would say:

We consider risk to ...

As a result, we have worked hard to rectify this behavior and last week finally removed the need for an Apiary account in order to use Private Traffic.

gets assigned a unique, personal URL when they visit our documentation for the first time.