add cocoapods install for travis
add cocoapods install for travis

JinlianWang/OHHTTPStubs,liufeigit/OHHTTPStubs,kazmasaurus/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,ThomWee/OHHTTPStubs,manuyavuz/OHHTTPStubs,liufeigit/OHHTTPStubs,sessuru/OHHTTPStubs,manuyavuz/OHHTTPStubs,JinlianWang/OHHTTPStubs,hirohisa/OHHTTPStubs,JinlianWang/OHHTTPStubs,virajs/OHHTTPStubs,tarbrain/OHHTTPStubs,SummerHanada/OHHTTPStubs,ThomWee/OHHTTPStubs,tarbrain/OHHTTPStubs,virajs/OHHTTPStubs,liufeigit/OHHTTPStubs,bruceflowers/OHHTTPStubs,kazmasaurus/OHHTTPStubs,virajs/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,JinlianWang/OHHTTPStubs,ThomWee/OHHTTPStubs,oenius/OHHTTPStubs,sessuru/OHHTTPStubs,ThomWee/OHHTTPStubs,hirohisa/OHHTTPStubs,hirohisa/OHHTTPStubs,virajs/OHHTTPStubs,bruceflowers/OHHTTPStubs,SummerHanada/OHHTTPStubs,oenius/OHHTTPStubs,SummerHanada/OHHTTPStubs,hirohisa/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,kazmasaurus/OHHTTPStubs,manuyavuz/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,tarbrain/OHHTTPStubs,SummerHanada/OHHTTPStubs,bruceflowers/OHHTTPStubs,tarbrain/OHHTTPStubs,oenius/OHHTTPStubs,sessuru/OHHTTPStubs,oenius/OHHTTPStubs