Reimplement load balancing using Observable.lift(). Rename some APIs to indicate command pattern.
Merge branch '2.x-commonclient' of https://github.com/Netflix/ribbon into 2.x-commonclient
Copyright headers added.
Rename module ribbon-client-extensions to ribbon and rename Java package names accordingly.
Merge pull request #109 from allenxwang/2.x-commonclient

Rename module ribbon-client-extensions to ribbon and rename Java packages