Suggestion: Gear comparison

First of all I want to thank you for actually taking the time to create and maintain d3planner, it is indeed a very useful resource and a must use for us playing Diablo. There is one thing though that I think would make this a tiny bit better and that would be "determining what to upgrade next". You see it's often hard to know what gear piece you would benefit the most of replacing. I often use d3planner to make a build I would strive for in-game, meaning all the items I add are perfect rolled and ancient. So a feature I would love to see is what I should spend my bloodshards on in order to get the most out of it. You already have a % perfection on the items that indicates how close it is to being perfectly rolled. So basically what I would love to see is that you could load up your character and compare it against a build you found/made to know how close to perfection your item is relative to the builds item. Knowing that would easily tell you what you should strive for to upgrade in order to get the most out of it. I will fork your project when I have the time and attempt to make one myself, then if it is a feature you'd like to add you could refine the code since I'm a little rusty on JavaScript and add it to the official d3planner.