Replace GW2DB and add item/recipe tooltips from Official API

This is a rather large pull request.

It will completely remove all references to GW2DB, including a table, and some columns in the database. (Run  config/migrations/20130914.remove_gw2db.sql )

It also uses the official GW2 API to show tooltips for items/recipes. This includes hovering over items.

Also, if you could please take a look at the autoload.php for me? For some reason I just can't get it autoloading the new GW2Spidy\GW2API namespace, so I added in a bunch of manually included files for now.

Let me know on IRC if you have any questions about this pull request.