feat(docs): support custom sphinx theme

docs/conf.py

@@ -124,7 +124,10 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'alabaster'
+# html_theme = 'alabaster'
+import sphinx_rtd_theme
+html_theme = 'sphinx_rtd_theme'
+html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the

requirements-dev.txt

@@ -4,3 +4,4 @@ pytest~=3.0.3
 pytest-cov~=2.3.1
 pytest-flakes~=1.0.1
 Sphinx~=1.4.8
+sphinx-rtd-theme~=0.1.9

setup.py

@@ -20,13 +20,9 @@
 if 'test' in sys.argv:
     setup_requires.append('pytest')
 
-tests_require = [
-    'pytest',
-    'coverage >= 3.7.1, < 5.0.0',
-    'pytest-cov',
-    'flake8',
-]
-
+# Read dev requirements
+with open('requirements-dev.txt') as f:
+    tests_require = f.read().splitlines()
 
 class PyTest(TestCommand):
     def finalize_options(self):