Merge pull request numpy#85 from rgommers/remove-linkcode

MAINT: set minimum Sphinx version to 1.2.3, remove linkcode extension.

Author: rgommers

numpydoc/linkcode.py

@@ -37,7 +37,7 @@
     author_email="[email protected]",
     url="https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt",
     license="BSD",
-    install_requires=["sphinx >= 1.0.1", 'Jinja2>=2.3'],
+    install_requires=["sphinx >= 1.2.3", 'Jinja2>=2.3'],
     package_data={'numpydoc': ['tests/test_*.py', 'templates/*.rst']},
     test_suite = 'nose.collector',
     cmdclass={"sdist": sdist},