Add workaround for Rails " " JSON response
Add workaround for Rails " " JSON response

Refs #65

allen-zeng/PromiseKit,pgherveou/PromiseKit,allen-zeng/PromiseKit,pgherveou/PromiseKit,pgherveou/PromiseKit,mxcl/PromiseKit,mxcl/PromiseKit,mxcl/PromiseKit