The VFAT file system of `/mnt/us` is case insensitive so that
require("json") from Spore which intends to load luajson module in
rock directory actually will load `frontend/JSON.lua`, the two JSON
parser libraries have slightly different APIs.
This patch remove the pure Lua JSON library in favor of `luajson` which
uses LPeg pattern marching backend for better performance.
Since wikipedia server is language specific we should first detect
language of the text by querying Google Translate. Make sure you have
access to both Google Translate and Wikipedia service to use this
function.
