PHILADELPHIA--(BUSINESS WIRE)--Comcast today announced that it will expand its Xfinity Home business by integrating new partner devices from August, Automatic, Cuff, Leeo, Lutron, Rachio, SkyBell and Whistle starting this summer, giving customers a single experience that connects and manages their home security and automation needs. Later this year, Comcast will release a Software Development Kit (SDK) and a certification program that will make it easier for partners to work with Xfinity Home a