packedjson2 - A new JSON library

[Araq]

Your implementation should inline data elements that fit in the about 3 bytes 
in the payload. For example: Numbers like 0, 1, 2, 3 are common and does not 
have to take up space in the BiTable. Likewise for short key names like "abc". 
This is reasonably easy to implement and should improve benchmark results quite 
a bit. It also means that the typical JSON data uses even less space.