Closes thatJavaNerd/JRAW#126
Closes thatJavaNerd/JRAW#126

Adds code to RestResponse to create a proper object for a HTTP 204 response. Prevents OAuthHelper.revokeToken() from throwing an exception on a 204 response.

ccrama/JRAW,thatJavaNerd/JRAW,fbis251/JRAW,fbis251/JRAW,thatJavaNerd/JRAW,ccrama/JRAW,thatJavaNerd/JRAW,fbis251/JRAW,Saketme/JRAW,Saketme/JRAW,ccrama/JRAW,Saketme/JRAW