Wisdom capacity implemented

I was already considering to can this feature just because I didn't find an elegant way to implement it on the server  (bad software developer), but I finally found a nice way to do it. The purple bar below the quickbar now shows how much wisdom capacity your character is using.

The amount of different spells you can have in your quickbar depends on your wisdom stat. Currently you can switch you hotkey assignment anywhere, but I plan to restrict this to towns, so you have to choose carefully which spells to assign before wandering into the world. That means a high wisdom stat is a prerequisite for a wizard who wants to be flexible.

Each spell uses level / 10 + rarity wisdom capacity. That means that rare spells use a lot more capacity than common spells.