Make Http method mandatory. Move template classes to package private. Added checking of inputs in HttpRequestBuilder. Added JUnit test for Hystrix request cache.
Merge branch '2.x' of https://github.com/Netflix/ribbon into 2.x-commonclient
Merge pull request #111 from allenxwang/2.x-commonclient

Minor changes and improvements for ribbon
Ribbon proxy cleanup. Add support for byte array.