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
Added hidden boolean to Tanks
Tank hides in trees

* Added hidden parameter to Tank
* Tanks check to see if surrounded by trees on all sides at each update,
and are hidden if so.
* Pillbox controller changed to only fire at non-hidden tanks.
Fixed bugs in integration tests
Merge pull request #308 from BU-CS673/production

Production
Added a speed modifier to all of the terrain concrete classes

Added a speed modifier field and getter to all of the terrain concrete
classes for calculating an objects max speed over a given terrain type.
getMaxSpeedModifier Unit Test

Added JUnit test for all of the maxSpeedModifier getters.
Speed Changes!

Tank speed changes based on the terrain it is traversing.
Added SpeedTestMap

Improve your internet and tank speed with this beauty!
Changed Crater and Rubble back to Terrains

* Added Tiled folder under /tools
* Added two tileset files for making maps
Merge pull request #310 from BU-CS673/Aaron_fixCraters

Changed Crater and Rubble back to Terrains
Fixes from Crater and Rubble changing to terrains.

Made corrections to the Parser class and some small speed tweaking on
the Speed Modifiers. Also added in a Tank Speed Test and map for further
tweaks to speed modifiers.
Changed to new Tilesets

New Tilesets to represent changes in Crater and Rubble and associated
updates to Parser and Maps.
Began implementing SendMap network command