Player Changes

Player is now two sphere's stacked vertically with the playerHeight
variable defining the distance between the top sphere and bottom.
Reintroduced fog to eliminate the glitchy skybox from showing.
Increased gravity (just temporary fix until acceleration and
playervector is introduced) to take out the painstakingly slow falling.
*Notable bug, in NoClip (F4 to toggle), when you press 'space', you jump
up about 300 blocks. No fix since we'll be eliminating bug when we have
'momentum' (simple momentum)