[PATCH 2/2] requirements: Use 'psycopg2-binary' package

[Stephen Finucane]

On Fri, 2018-02-09 at 11:52 +0000, Stephen Finucane wrote:
> This resolves a deprecation warning that's recently been raised:
> 
>   UserWarning: The psycopg2 wheel package will be renamed from release
>   2.8; in order to keep installing from binary please use "pip install
>   psycopg2-binary" instead. For details see:
>   <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
> 
> Signed-off-by: Stephen Finucane <stephen at that.guru>

Applied both of these.