When clicking the "options" menu item the following must happen:

• The options.json configuration file is loaded.
• A graphical representation of each option is loaded into a widget so that it can be changed.
• The options can be changed and the resulting json file is updated.

The following options should be implemented:

• Resolution (1024x768,800x600,640x480`)
• Music Volume (0 - 100)
• SFX Volume (0-100)
• Fullscreen (toggle button)