Fixed Sphinx building issues and enabled nit-picky mode by default to fix #30

Author: wolph

docs/conf.py

@@ -60,4 +60,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+# html_static_path = ['_static']
+
+intersphinx_mapping = {'python': ('https://docs.python.org/3', None)}
+

tox.ini

@@ -31,7 +31,7 @@ commands =
     mkdir -p docs/_static
     sphinx-apidoc -o docs/ python_utils
     rm -f docs/modules.rst
-    sphinx-build -W -b html -d docs/_build/doctrees docs docs/_build/html {posargs}
+    sphinx-build -n -W -b html -d docs/_build/doctrees docs docs/_build/html {posargs}
 deps = -r{toxinidir}/docs/requirements.txt
 
 [flake8]