Warning: psycopg2 binary

[cswh]

The following warnings occur when setting up at d8a6047:

(venv) $ python setup-database.py 
~/openmod.sh/venv/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
  return f(*args, **kwds)
~/openmod.sh/venv/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
  return f(*args, **kwds)
~/openmod.sh/venv/lib/python3.5/site-packages/psycopg2/__init__.py:144: 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>.
  """)

 (venv) $ python openmod.sh.py 
~/openmod.sh/venv/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
 return f(*args, **kwds)
~/openmod.sh/venv/lib/python3.5/importlib/_bootstrap.py:222: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
 return f(*args, **kwds)
17:56:16-INFO-Path for logging: ~/.oemof/log_files
* Serving Flask app "openmod.sh.web" (lazy loading)
* Environment: production
...

@gnn Can you have a look?