Updated travis-ci yaml file to include tvOS tests on xcode7.1 image.
Updated travis-ci yaml file to include tvOS tests on xcode7.1 image.

sessuru/AlamofireImage,Alamofire/AlamofireImage,sessuru/AlamofireImage,Pluto-tv/AlamofireImage,Baza207/AlamofireImage,Alamofire/AlamofireImage,daniele-pizziconi/AlamofireImage,easyui/AlamofireImage,Baza207/AlamofireImage,Pluto-tv/AlamofireImage,easyui/AlamofireImage,daniele-pizziconi/AlamofireImage