Merge pull request #292 from BU-CS673/production

Update Brandon with Production Latest
Merge pull request #295 from BU-CS673/Canfield-Staging

Canfield-Staging -> production
Merge pull request #299 from BU-CS673/production

Production
Added Map Building Tilesets

Added the two tileset files to the tools folder for building maps in
Tiled.
Merge pull request #300 from BU-CS673/Brandon

Added Tileset Files
Began implementing >2 multiplayer
Continued >2 multiplayer implementation
Implemented local collision checks

* Methods in TileUtil return a list of entities that are likely to
collide/overlap with a given position or Tile Location
* Added lists of actors and effects to the GameWorld class, added in
addEntity
Additional server implementation
Added unit tests.
>2 multiplayer is working; a few issues remain
Most remaining network issues are resolved
Fixed bugs

* removed mapTiles[][] initialization in GameWorld constructor -- should
be null unless the parser is used or the tiles are set manually. This
was causing the errors in TileUtil.
* Changed unit tests for TileUtil to use both overloaded and
non-overloaded methods.
* Added getClosestTileX/Y to TileUtil.
Fixed network concurrency issue
Added addtl info to GameWorld constructor exception
Removed print statement
Merge pull request #303 from BU-CS673/Aaron

Implemented local collision checks for Tank
Began implementing SendMap network command
Merge pull request #311 from BU-CS673/production

Production -> Canfield
Implemented SendMap net command