Experiments with emscripten and D

[Piotr Szturmaj]

This is SDL and std.algorithm code translated to JavaScript with 
emscripten. I've used the latest git versions of LDC and emscripten (the 
latter needed some modifications).

https://gist.github.com/pszturmaj/6244260
https://gist.github.com/pszturmaj/6244266

I couldn't manage to post it as single gist, and it seems there's a bug 
in the sdl.html gist (it looks empty). Just click Download Gist or '< >' 
icon (view raw) and save it as sdl.html.

Then open sdl.html in the web browser. It should print sorted and mapped 
array contents and run simple graphics demo.

I'm starting to work on this to fix the rest of the druntime so it can 
work under JS VM. Any help with this will be appreciated :-)