Made all the parts of the card view into "drawables" - really small
classes which draw themselves. More like split apart functions put in
their own files. Also started on mana symbol drawing.
Woo! Mana symbols work (well, ignoring icons but we'll get to that bridge
later). This means the card view is pretty much done, minus any
optimizations or fine tuning we decide to do later. Now we can officially
move on to different components. :)