add initial quickbarmenu, aka quickslot things.

so like keys 1-8, or something. i think it's best if it stores its own
inventory items as well, and dragging from main inventory to here, or
"equipping". I guess it is kind of equipping, since this would only
be for non-armory things, like swords, torches etc.
add quickbarmenu, aka quickslots 0-7, etc...
add proof of concept for inventory slots, through librocket
fix quickbar slot sizing
use a better image/colors for it
add the sub quickbarslot, i really hate how i don't know how to make

this into a template, but it's not too bad..