Drink Umbrellas as Hats

[kyle2143]

So perhaps I shouldn't have promised I'd add this before I looked at the code. This is a good deal harder than I thought; for starters, there are at least 3 different types of umbrella objects for drinks and a lot of re-colors. The main issue though is that apparently in order to wear an item in the head slot, it has to extend obj/item/clothing/head or something. And the current umbrella objects do not, and changing it to that would break or require some ugly rewrites to its current code.

Having said that, creating a new wearable flower object might be a more reasonable change to make since it can be specifically made to be worn.