std.json and std.uni

[Jeremie Pelletier]

I've written a simple JSON parser and serializer for phobos, it was 
originally posted in [dmd support for IDEs] but I think it needs to be 
posted here.

It also requires a more complete unicode handling module than the one 
currently in phobos so here it is too.

std.json: http://pastebin.com/f64b75abb
std.uni: http://pastebin.com/fe47f274

Hopefully they'll make it to the official phobos.

Jeremie