* issue 3914, removed logic that remove header parameters. update template files to handle header parameters in the same manner as other parameters * update swift and swift3 samples
* remove php apache license * remove apache license from C# * remove apache license in objc code * remove license from swift 3 code * remove apache license from perl code * remove license from scala code * remove license from ts, go, android, cpp, scala * remove license from java api client * restore clojure petstore files * remove license from travis file * clean up apache-related terms in php, ruby, python mustache tempaltes * remove license from JS API cilent
* fix #3477, add RxSwift support for Swift * make the SwaggerClient scheme shared