Setup unit testing. Fixed small bug in camera centering

src/Blaze-Brigade.sln

src/Blaze-Brigade/Blaze_Brigade/GameFunction.cs

src/BlazeBrigadeTest/BlazeBrigadeTest.csproj

src/BlazeBrigadeTest/GameFunctionTest.cs

src/BlazeBrigadeTest/Properties/AssemblyInfo.cs

src/BlazeBrigadeTest/bin/Debug/BlazeBrigadeTest.dll

src/BlazeBrigadeTest/bin/Debug/BlazeBrigadeTest.pdb

src/BlazeBrigadeTest/bin/Debug/Blaze_Brigade.exe

src/BlazeBrigadeTest/bin/Debug/Blaze_Brigade.pdb

src/BlazeBrigadeTest/bin/Debug/Content/2archer.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2archer_attack.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2archer_stats.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2mage.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2mage_attack.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2mage_stats.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2warrior.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2warrior_attack.xnb

src/BlazeBrigadeTest/bin/Debug/Content/2warrior_stats.xnb

src/BlazeBrigadeTest/bin/Debug/Content/BattleTheme.xnb

src/BlazeBrigadeTest/bin/Debug/Content/Bow.xnb