Modified the Game Over Screen to be the same size as the Title Screen Background

-Modified its size in XAML to be the same as the Title Screen Background's size
Removed multi-touch support because it gave touch players an advantage

-Modified the Game Over Screen's XAML code to put the image in a Viewbox instead
-Reduced the width of the Game Over Screen to prepare it for drawing via XNA
-Put the logic for switching weapons with the Keyboard in a separate method with the signature: void CheckSwitchWeaponKB()
Finished swipe support to switch weapons
Refactoring and Commented the Swiping Code

- Changed the weapon numbers for the Warhammer and Spear from 2 and 1 to 1 and 2, respectively. Changed their order in the Weapons array in Player.cs, and changed their Tag numbers on GamePage.xaml
- In Input.cs, renamed IsScreenSwiped to GetSwipeDelta, and create a separate IsScreenSwiped method
- Renamed CheckSwitchWeaponKB to CheckSwitchWeapon
Finished the Game Over and Victory Screens

- Created the Victory screen, and added it as a screen in ScreenManager.cs
- Added two new game states in Game1.cs: GameOver and Victory
- When switching to the Game Over screen, changed the game state to GameOver instead of Screen in Palyer.cs
- The images in the middle of both the Game Over and Victory Screens are drawn using XNA for better-quality rendering
- Refactored some of the code in ScreenManager.cs to make it shorter
- Added the Victory Screen image and the "Victory" text image to the project
- Set the name of the game to show up on the Medium, Wide, and Large Live Tile sizes instead of just the Medium size
Modified the Victory Screen

-Added a Happy version for each Archer, but the individual graphics are excluded from the project
-Added a new Victory Screen which is the same as the previous one except all Archers are replaced with their Happy versions
Merge branch 'ModifiedVictoryScreen'