Finalized branch example. SDL init and cross-compile

Finalized branch example. SDL init and cross-compile
    src/SConscript
    src/main.cpp
    utils/linux_build.py
    utils/win_build.py
Extended main.cpp to create a small window

Extended main.cpp to create a small window
    src/main.cpp
Finalized branch example for SDL_image

Finalized branch example for SDL_image init and cross-compile

    src/main.cpp
    utils/linux_build.py
    utils/win_build.py
Changed executable name

Changed executable name
    src/SConscript
Finalized branch example for SDL_mixer

Finalized branch example for SDL_mixer init and cross-compile

    src/SConscript
    src/main.cpp
    utils/linux_build.py
    utils/win_build.py
Finalized branch example for SDL_ttf

Finalized branch example for SDL_ttf init and cross-compile

    src/SConscript
    src/main.cpp
    utils/linux_build.py
    utils/win_build.py
Finalized branch example for GLEW/OpenGL

Finalized branch example for GLEW/OpenGL init and cross-compile

    src/SConscript
    src/main.cpp
    utils/linux_build.py
    utils/win_build.py
Added README.md, updated master to advanced branch

Added README.md, updated master to advanced branch
    README.md