Easily the biggest commit yet

-Added cl-fad to dependency list
-minis are now implemented (still no custom minis; working on it)
-tablecloths are now implemented (still no custom tableclblah blah blah)
-fixed droppable bug related to window scrolling. Not pixel-precise, but I think this is as close as we're gonna get
-fixed droppable bug which kept competing droppables disabled even after a droppable event was completed
-added go-board tablecloth
-added chess-board tablecloth
-added chess/checkers/go/chinese-checkers minis
-added all relevant images
-dragging a card/mini/stack to your backpack now removes it from play (may want to keep this at just minis. Might get a bit confusing otherwise)
-chat history is now tracked in-cookie for completion purposes
-player tag is now tracked in-cookie for completion purposes
-dice counts for rolling icons in backpack are now tracked in-cookie for ease of use (I still prefer rolling via the @roll command)
-position of zoomed card and table-toolbar is now tracked in-cookie for ease of use
-did I mention we had zoomed cards now? We have zoomed cards now.