CraftMine64 0.2 bugfix update

it works now, woo! here's a changelog. those are always fun, right?

-added mac and web builds

-building and breaking blocks now works correctly

-lighting has been improved and shadows have been added to improve visual clarity

-C418 - sod now plays to make it feel more minecraft-y

-the block coordinate system now works with a 3D array of Vector3s instead of a list of lists of ints. it doesn't actually change anything gameplay or performance-wise, it's just less of a headache for me personally. yay!

-added a crosshair, woo yeah

-it just works now, I guess. that's cool.

-oh I also added new screenshots. that too.