Implemented the usage of Texture2DHolder.cs in Map.cs to get rid of the dependency of Texture2D
Also create a stub for Texture2DHolder.cs for testing of map
Signed-off-by: Christoffer Johnsson <stoffe1992@hotmail.com>
Merge branch 'master' of github.com:refforis/Racing-Game

Conflicts:
	src/RaceGame/RaceGame/RaceGame/Car.cs