Converted Swift sample to Swift 2.0 & Xcode 7 beta 5
Converted Swift sample to Swift 2.0 & Xcode 7 beta 5

hirohisa/OHHTTPStubs,SummerHanada/OHHTTPStubs,SummerHanada/OHHTTPStubs,virajs/OHHTTPStubs,tarbrain/OHHTTPStubs,virajs/OHHTTPStubs,SummerHanada/OHHTTPStubs,SummerHanada/OHHTTPStubs,hirohisa/OHHTTPStubs,hirohisa/OHHTTPStubs,tarbrain/OHHTTPStubs,oenius/OHHTTPStubs,virajs/OHHTTPStubs,hirohisa/OHHTTPStubs,oenius/OHHTTPStubs,tarbrain/OHHTTPStubs,virajs/OHHTTPStubs,oenius/OHHTTPStubs,tarbrain/OHHTTPStubs,oenius/OHHTTPStubs