nsh 0.5.0

[Jesús Leganés-Combarro]

Finally I've managed to fix the problem with interactive Node.js shells on nsh and published nsh 0.5.0. With that, finally we have a more powerful shell that try to follow the POSIX shell specification instead of the naive one we had before, and also it's using coreutils.js builtins by default. It needs some testing and improvement but it's totally usable, so go in and tell me your opinion :-)

With that done it's only pending the git client to have fully finished the 1.0.0 roadmap, so since there have been discussion about that before, do you think we could manage to have the final 1.0.0 version, or at least a 1.0.0-RC4 just for the keynote of this saturday? :-)