Renaming the project into ARMClient.
Refactoring AADHelpers into ARM.Authentication.AADAuthentication.AuthHelper and PersistentAuthHelper.
    AuthHelper: Saves auth cache in memory.
    PersistentAuthHelper: Saved auth cache in a file under %USERPROFILE%\.csm
Adding ARMClient.Library
Adding ARMClient.Library.Runner
Adding *Async<T> methods to Library.ARMClient and updating the example