added several modules

var/spack/packages/py-cython/package.py

var/spack/packages/py-dateutil/package.py

var/spack/packages/py-epydoc/package.py

var/spack/packages/py-ipython/package.py

var/spack/packages/py-matplotlib/package.py

var/spack/packages/py-numpy/package.py

var/spack/packages/py-pexpect/package.py

var/spack/packages/py-pygments/package.py

var/spack/packages/py-pyparsing/package.py

var/spack/packages/py-pyside/package.py

var/spack/packages/py-pytz/package.py

var/spack/packages/py-scipy/package.py

var/spack/packages/py-six/package.py

var/spack/packages/py-virtualenv/package.py