Spring RTS Engine

test widget

PS: Untested in a real match yet.
PS*: Don't forget that it needs a spring svn build

Oh that drift... bah..

I thought maybe we would finally be getting some Momentum and sliding physics for units, that would be sexy for use on units such as hovercraft.

Brakerate? >___>

not the same thing.

@ Mr. D: The code exists since before 75 was released, but was disabled for some reason.