Created preliminary castle sprite

-Added an OutputValue method in Debug.cs that takes in an object and writes it to the Output window

I will push this branch again when the castle is complete
Polished and completed the Fort aka Castle

-Positioned the fort so the entrance is roughly near the middle of the screen
Created the Background Image for the Shop

-Created XAML Styles for the Level End Buttons and the Shop Background Image
-Added the Background Image for the Shop to the Shop UI
-Set the Shop background to white
-Made Shop Items get purchased instead of used when the player clicks on them in the Shop
-Set the MaxLevel to 1 by default in ShopItem.cs
-Set a price to the ShopItem on CastleUpgrade.cs
Merge remote-tracking branch 'origin/ShopBackground' into PlayerCastleSprite
Merge branch 'PlayerCastleSprite'