Players are now solid to each other and can push each other
Players can now attack each other (but they do not deal damage)
Players can bounce on top of each other, and they get squished
temporarily
Players are given slightly offset positions when they transition between
areas and levels, so they're no longer on top of one another.
Created functions to trivially translate an ID to a Behavior and vice
versa. Sent ID over packets instead of Behavior pointer. This should
allow Linux and Windows to play together.
Added Luigi model.
Renamed all previous references to 'Luigi' to 'Mario2' since player 1
isn't always mario, and player 2 isn't always luigi.
Now server is always mario and client is always Luigi.
Luigi model credits:
Original model by Cjes, converted by AloXado320, textures added/fixed by
SunlitSpace542.