Load all items from JSON, teleport packet and Ezreal e, and other stuff(updated)

Updated 27/7:
load items from item.json using jsoncpp library

I haven't included item.json, you have to get it manually from http://ddragon.leagueoflegends.com/cdn/4.12.2/data/en_US/item.json
put it into data/item.json

(don't think it would be a good idea to add anything by Riot as it is their property)