Template for Passive Item that Modifies Stats

I made a template for creating a mod that has passive items that modify stats.

Anyone's free to use it, and if anyone finds anything that's wrong or something that could be more efficient let me know!

main.lua: http://pastebin.com/xHbLasHi

metadata.xml: http://pastebin.com/r4WxnnUP

items.xml: http://pastebin.com/CF1FudGY

I'll be trying to make more templates for active items, passive items with effects, etc