This implies creating a trimmed down branch that contains almost
nothing. It will then be usable by projects that do not need the
complex build system, and by the engine itself as a submodule from
the same repository.

Does not work very well because of CORS restrictions in browsers.

Shader replacement code for older shader version is now fixed

This will allow us to generate sounds on the fly on several dedicated
channels. Until now we could only play fully loaded samples.

to external so as to avoid some autocompletion collisions with "configure".

that the OpenGL framework on OS X provides GL version 2 at least.