Binding doesn't support multipart/form-data

[techjanitor]

context.go only supports application/x-www-form-urlencoded for forms:
case c.Request.Method == "GET" || ctype == MIMEPOSTForm:
b = binding.Form

[GIN] 2014/09/01 - 03:48:13 | 400 | 248.788us | 172.4.231.9 POST /post
Error #1: unknown content-type: multipart/form-data
Meta: Operation aborted