RFC 3986 URI Query Escape/Unescape inspired from "net/url" written in Go

Use go get.

go get github.com/colduction/rfc3986

• Unlike the "net/url" standard package, it percent-encodes space character with binary octet 00100000 (ABNF: %x20) too.
• Current package is limited to only two functions:
  1. QueryEscape
  2. QueryUnescape