Restructured files into folders

Restructured files into folders src/ and data/
    cheeseburger.ttf     -> data/cheeseburger.ttf
    image1.bmp           -> data/image1.bmp
    image2.bmp           -> data/image2.bmp
    image3.bmp           -> data/image3.bmp
    image4.bmp           -> data/image4.bmp
    image5.bmp           -> data/image5.bmp
    Main.cpp             -> src/Main.cpp
    Sprites-alpha.cpp    -> src/Sprites-alpha.cpp
    Sprites-rotating.cpp -> src/Sprites-rotating.cpp
    Sprites.cpp          -> src/Sprites.cpp
    Text-dynamic.cpp     -> src/Text-dynamic.cpp
    Text-static.cpp      -> src/Text-static.cpp