Don't send ready to the server when playing replays.
Basic collision response for units.
It should not be possible to accidentally shoot missiles down.
Fiddle with the terrain slightly.
Make PinToTerrain apply an offset to the position.

Flying things no longer have a hard-coded offset baked into their
prefab and projectiles aren't pinned to the ground.
Move collision response into a seperate folder.
Stop nicely when replays end.
Tweak the tank shell tails slightly.
"Fix" sqrt overflow problem in the prediction code.
Really make sure replay files are closed when returning to the lobby.