2.0.0

• Parse truly values in querystring (e.g. ?bar&foo=42 => bar is true)
• Stringify truly values ({ bar: true, foo: 42 } => foo=42&bar)
• Small syntax changes.
• Return undefined for fields that do not exist in the querystring snippet.
• Added tests
• Generated docs using Blah. 📝 📖
• Added the hash method.

Fixes #17, #18. 🎉