Update README

Updates README to reflect 0.7.0 API and to provide more use cases (particularly client-side).
Because it doesn't yet have a stable version. If you have specified
`"minimum-stability": "dev"`, you can omit it, but only then. Once we have
a stable version, I can omit it from the instructions.
On Nov 5, 2014 6:47 PM, "Hari K T" <notifications@github.com> wrote:

> In README.md:
>
> > @@ -19,7 +19,7 @@ Installation and Requirements
> >  Install this library using composer:
> >
> >  ```console
> > -$ composer require "psr/http-message:~0.2.0@dev" "phly/http:~1.0-dev@dev"
> > +$ composer require "psr/http-message:~0.5.1@dev" "phly/http:~1.0-dev@dev"
>
> Why do you keep the psr/http-message ? . As it is already defined in the
> composer.json I think it not needed.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/phly/http/pull/16/files#r19919149>.
>