X64 conversion

OpenGL Game Engine vendors :

You need to erase the `/Vendors` folder.

Then unzip this archive and replace the old `/Vendors` by this one
https://www.dropbox.com/sh/s3aewueedfe430p/0rCZW6_qv_

You will find in the new directory the different dll needed

You ca delete the `/Build` directory, it's not used anymore

Now x32 compiled release will be in `Win32/Release` and debug in `Win32/Debug`

x64 compiled binaries will be in `/x64/[Debug/Release]`

Assets have to be recompiled if you swith between x64 and Win32

Close #130