Alternative piping syntax

[Mihailoff]

echo sh::grep('html', sh::curl('http://example.com', array(
    'location' => true
)));

In current API I don't like 2 things:

1. inverted order of commands (grep -> curl) when actually curl | grep is intended
2. "wrap" or functional style a(b(c()))

It would be nice to have fluid API like this

sh::curl('http://example.com')->pipe('grep', 'html')->pipe('whatever');

or

sh::curl('http://example.com')->sh('grep', 'html')->sh('whatever');

or

sh::curl('http://example.com')->grep('html')->whatever();

@MrRio what do you think?

[MrRio]

Yeah I like that!