Added audiostream recipe

[JonAnCla]

I've included code to allow either sdl or sdl2 dependency.

However the library itself only links against SDL1 at the moment - the library needs to be changed to know when it is being linked against SDL2 (library names to link are slightly different)

[inclement]

Nice, thanks. Could you make the recipe actually fail (I guess print a message and throw an exception or just exit()) if it's built with sdl2, to make it clear to the user what the problem is? I think that would be the best way for now.

[JonAnCla]

Sure - just added that. Do you know of a way of passing an option to setup.py (distutils) so that we can tell audiostream whether to do an SDL or SDL2 link? If there is a mechanism for passing that info I can get the SDL2 route finished off. Thanks!

[inclement]

Thanks, merged.

I'm not sure what's the best way to pass things to setup.py. One option is an environment variable (and to modify the setup.py to check it) - this is what e.g. kivy does. A cruder option is what I did with pyjnius, to add a patch that changes the behaviour, but this is less desirable.

[JonAnCla]

OK thanks, an environment variable would pretty easy to set up.

I'll add that in when I get back to testing what I'm working on with the sdl2 bootstrap.

Cheers!