title: python is not installing dependencies listed in install_requires of setuptools
body: <p>I have written a python module that depends on openpyxl. I want openpxyl to be installed as a dependency automatically using setuptools.
  I read that the proper way to do this is to include the following in the setup.py script:</p>
  
  <pre><code>setup(name='methpipe',
      version=find_version("lala", "__init__.py"),
      description='Utilities',
      author='Jonathan T',
      author_email='jt@lala.com',
      url='https://git.com...',
      packages=find_packages(),
      install_requires=[
          'openpxyl = 2.3.3',
      ],
      scripts=["bin/submit_run_full.py"],
      cmdclass=dict(install=my_install)
  )
  </code></pre>
  
  <p>So I packaged up my module with <code>python setup.py sdist</code>, took the *.tar.gz file, unzipped it, and then ran <code>python setup.py install</code>, and openpyxl is NOT installing!!!</p>
  
  <p>What am I doing wrong here?</p>