v1.1.0

Fork with merges of pending pull requests:

• Fix DeprecationWarning about os.tmpDir() (Christian)
• Update buffer.write order of arguments for Node 7 (Kornel Lesiński)
• JSON Parser emits error events to the IncomingForm (alessio.montagnani)
• Improved Content-Disposition parsing (Sebastien)
• Access WriteStream of fs during runtime instead of include time (Jonas Amundsen)
• Use built-in toString to convert buffer to hex (Charmander)
• Add hash to json if present (Nick Stamas)
• Add license to package.json (Simen Bekkhus)