Description: Fix documentation issues
 Removes the imgmath extension, (there appear to be no `.. math`
 fields in the docs), unsets the default fontcssurl (which defaults to
 a google web font) and removes the overwrite template which rewrites all
 links to point to http://xon.sh/

Author: Gordon Ball <gordon@chronitis.net>

--- a/docs/conf.py
+++ b/docs/conf.py
@@ -54,7 +54,7 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.doctest', 'sphinx.ext.imgmath',
+extensions = ['sphinx.ext.autodoc', 'sphinx.ext.doctest',
               'sphinx.ext.inheritance_diagram', 'sphinx.ext.viewcode',
               #'sphinx.ext.autosummary',
               'numpydoc', 'cmdhelp',
@@ -160,11 +160,11 @@
         'externalrefs': False,
         'collapsiblesidebar': True,
         'default_layout_text_size': "100%",  # prevents division by zero error
+        'fontcssurl': ''
         }
 
     # Add any paths that contain custom themes here, relative to this directory.
     html_theme_path = ["_theme", csp.get_theme_dir()]
-    templates_path = ["_templates_overwrite"]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".