v1.7.0

• when attaching files, read default filename from the File object (JD Isaacks)
• add direction property to progress events (Joseph Dykstra)
• update component-emitter & formidable (Kornel Lesiński)
• don't re-encode query string needlessly (Ruben Verborgh)
• ensure querystring is appended when doing stream.pipe(request) (Keith Grennan)
• change set header function, not call this.request() until call this.end() (vicanso)
• add no-op withCredentials to Node API (markdalgleish)
• fix delete breaking on ie8 (kenjiokabe)
• don't let request error override responses (Clay Reimann)
• increased number of tests shared between node and client (Kornel Lesiński)