Created a base LevelObject class with a Parenting system

-Created LevelObject.cs
-Created Hurtbox.cs
-In Game1.cs, changed activeTime from public to private and added a public static getter called ActiveTime
-Added ScalableBox, a 1x1 white box we can use to color however we wish and scale as much as we want
Made the Ingame Game Mode Work

-Added a StartGame method to Game1
-Made the graphics draw while on the Ingame mode
-Added test sounds and songs to LoadAssets
Merge remote-tracking branch 'origin/IngameModeSetup' into BaseLevelObject

Conflicts:
	Defend Your Castle/Defend Your Castle/LoadAssets.cs
Merge branch 'BaseLevelObject'