Began implementing >2 multiplayer
Continued >2 multiplayer implementation
Additional server implementation
>2 multiplayer is working; a few issues remain
Most remaining network issues are resolved
Fixed network concurrency issue
Added addtl info to GameWorld constructor exception
Began implementing SendMap network command
Merge pull request #311 from BU-CS673/production

Production -> Canfield
Implemented SendMap net command
Worked on network tests
Fixed additional network tests
Fixed problems with the SendMap net command
Added AbstractGameApplication
Network fixes in Sprint2 app due to interface changes
More StartGame net command fixes
SendMap net command fixes
Bullets now explode when they reach max distance

This provides an example of how the graphics system should be used to
create effects that don't have an impact on the underlying simulation.
Reduced bullet explosion time per frame
Documented the NetworkObserver interface