Tony is correct that the community installer is the best place to start. For the next month or so the rest of the installation of the Lambda and the skill is manual. I recommend starting here and to ping me (in the Ask Alexa thread: [RELEASE] Ask Alexa) if you need assistance: http://thingsthataresmart.wiki/index.php?title=Ask_Alexa
By April (hopefully) we can get all of this automated!
Good luck!