Wii U port v1.3

Changelog:

• Use the GamePad touchscreen for mouse emulation (Thanks @aaronjamt)
• Allow the home button to be used as an input (Thanks @aaronjamt)
  (To exit streaming, hold the home button for 3 seconds)
• Added an autostream option to automatically start the stream on app startup
• General app and user interface improvements:
  • Better looking font system using the Wii Us system font
  • Errors while streaming are now displayed properly
  • The app no longer needs to be exited on errors
  • Moonlight-wiiu can now be injected into a channel
  • ...
• Minor performance improvements
• Merged all changes from moonlight-embedded
• Updated all libraries
• Added an icon and meta.xml (Thanks @Ploggy)