Release Candidate and Support: Amazon Echo Control Binding

There has been a lot of trouble with the amazon binding the last weeks. @J-N-K and @Trinitus01 spent a lot of time investigating, implementing and testing with others. Most of the problems are solved now, from what i understand.
There were also talks about the OTP and to set your account to “not required”. As OTP has never been supported by openhab up to now, this info maybe a bit hard to realize in this thread.
Maybe this info should find its way into the docs.