use napoleon instead of numpydoc

docs/requirements.txt

@@ -1,3 +1,2 b''
-numpydoc
 -e .
 ipykernel

docs/source/conf.py

@@ -60,7 +60,7 b' extensions = ['
     'sphinx.ext.intersphinx',
     'IPython.sphinxext.ipython_console_highlighting',
     'IPython.sphinxext.ipython_directive',
-    'numpydoc',  # to preprocess docstrings
+    'sphinx.ext.napoleon',  # to preprocess docstrings
     'github',  # for easy GitHub links
     'magics',
 ]

setup.py

@@ -182,7 +182,7 b' setuptools_extra_args = {}'
 extras_require = dict(
     parallel = ['ipyparallel'],
     qtconsole = ['qtconsole'],
-    doc = ['Sphinx>=1.1', 'numpydoc'],
+    doc = ['Sphinx>=1.3'],
     test = ['nose>=0.10.1', 'requests', 'testpath'],
     terminal = [],
     kernel = ['ipykernel'],