More multiplayer progress

Slowly but surely making progress getting things working with online mutliplayer. There's still a long ways to go. So far there's... [list] [*]Player spawn sync [*]Projectile sync [*]Player level, upgrade, xp and skill point sync [/list] Some of those things still need to be fixed even more so that they properly handle what happens on a newly joining player's game when there's already a game in progress. I still need to think about whether or not players should even be able to join while the game is in progress. [img]http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/30701995/3cecf56fb1cfff61681e4408b6f94f49c995ceb7.jpg[/img]