Small Bug Fix, New Nodes, Slight Visual Tweak

• Fixed a bug where the Fog would be removed (visually) by planting a Node, but the tile would still not be de-fogged (meaning you couldn't place nodes there)
• Also made it so the Fog actually gives you gold when taken away by planting a node. Fog should give you gold no matter how it is removed (planting a node or bouncing a ball) now
• Added new nodes that get randomly generated, Countdown & Frenzy. Each has a number on it. When that number is depleted down to 0, they launch an equivalent number of shots. I wanted something that promotes exploration + makes finishing off Voids easier. These new nodes offer both
• Flattened the visual style of the empty tile node. I think it looks much better now

As always, let me know what you think!