Made the Spear Weapon Work

-Added a Click event to the Spear Weapon Button in the HUD
-Created a new Shop object when the player starts a new game
Completed the alphabet and created a TrueTypeFont (ttf) for the game

-Added a larger castle icon and displayed it in the shop
Created the Background for the Options Screen

-The color of the Options Screen background is subject to change, but the same basic concept will be used
-Added the DefendYourFortFilled font to the Content folder
Rehauled the Screen System

-Changed it from using specified coordinates on a Canvas to being center-aligned on screen in a Grid
-Created the StackPanelMenuStyle and ScreenBackgroundImageStyle XAML Styles in App.xaml
-Commented out the cursor and all of its associated variables and methods from MenuScreen.cs since it is no longer needed
-Added methods for creating a background image, a Button, and vertical and horizontal menus in MenuScreen.cs
-Renamed the "AllControls" list to "Controls" in MenuScreen.cs
-Changed the constructors of TitleScreen.cs and OptionsScreen.cs to fit the new screen system
Detected Saved Game Data and Displayed a Notification When the Player Saves the Game

-Detect save data when GamePage.xaml is loaded, and enable/disable the Continue Game button on TitleScreen.cs accordingly
-Displayed a "Game Saved!" notification, similar to the Level Start message, when the player saves the game in the Shop
Created the Armored Goblin and the corresponding invincible sheet

-Loaded in the graphics in LoadAssets.cs and replaced the current ArmoredEnemy's graphics with the new sheet
Created a spritesheet for the Spear Goblin with an accompanying Invincible sheet

-Added the Spear Goblin spritesheets to LoadAssets.cs
-Made the weapons display in the Weapon buttons on the HUD. Fixed this by replacing all backslashes in the image path with forward slashes
-Reduced the font size of the Shop Item descriptions by 4
-Loaded the player's data when he/she selects the "Continue Game" option on the title screen. This was previously removed because the player's data is loaded when GamePage.xaml is loaded
Merge remote-tracking branch 'origin/SpearEnemySprites' into ArmoredGoblinSheet
Merge branch 'ArmoredGoblinSheet'