Fixed bug where content type header was undefined
Fixed bug where content type header was undefined

brianjmiller/TinCanJS,EdDixon/TinCanJS,garyfeng/TinCanJS,garyfeng/TinCanJS,garemoko/TinCanJS,RusticiSoftware/TinCanJS,FishHooks/TinCanJS,EdDixon/TinCanJS,RusticiSoftware/TinCanJS,garemoko/TinCanJS,brianjmiller/TinCanJS,FishHooks/TinCanJS