New test project.
Dll files copied to make the test program run on windows.
Using the new delete feature in C++11.
Support for multiple windows.
Remove the dll files. Better for the user to fix it manually instead
of forcing the user to use a specific version of SDL2. In windows
one solution may be to add the dll paths to the system path.
Added test image.

Textures can now be shared between windows.
Made code more readable.
Merge branch 'develop'