Use separately packaged sphinxcontrib_github_alt

Author: takluyver

docs/doc-requirements.txt

@@ -1,3 +1,4 @@
 sphinx>=1.3.6
 sphinx-rtd-theme
 nbsphinx
+sphinxcontrib_github_alt

docs/environment.yml

@@ -12,3 +12,4 @@ dependencies:
   - nbsphinx
   - Send2Trash
   - prometheus_client
+  - sphinxcontrib_github_alt

docs/source/conf.py

@@ -30,8 +30,6 @@
 # add repo root to sys.path
 # here = root/docs/source
 here = os.path.abspath(os.path.dirname(__file__))
-sphinxext = os.path.join(os.path.dirname(here), 'sphinxext')
-sys.path.insert(0, sphinxext)
 repo_root = os.path.dirname(os.path.dirname(here))
 sys.path.insert(0, repo_root)
 
@@ -72,7 +70,7 @@
     'sphinx.ext.mathjax',
     'IPython.sphinxext.ipython_console_highlighting',
     'nbsphinx',
-    'github',
+    'sphinxcontrib_github_alt',
 ]
 
 # Add any paths that contain templates here, relative to this directory.