Joystick support via SDL2 library?

Hi,

So here is a Testproject with binaries. This is compiled with VC2015 and as dynamic version. I created/tested this with the editor version 4.10 from launcher. Sorry for the size.

The branch 4.10 has precompiled dll and build batches etc. I had to add some libs for the crt linker problems into the cmakefiles.txt. So it compiles and links now all the sdl2 libraries.

The JoystickPlugin uses the dynamic version of dll due to linker errors with the static version. A well known problem with VC2015!?

At this time it´s very painful to work with windows version - due to the changes of VC2015. On Linux it seems to be more smooth…

tsky