Patch to have the documentation build even without a sphinx module and
an html theme.

diff --git a/Documentation_src/source/conf.py b/Documentation_src/source/conf.py
index aa1eba8..07b3b26 100644
--- a/Documentation_src/source/conf.py
+++ b/Documentation_src/source/conf.py
@@ -30,8 +30,8 @@ sys.path.insert(0, os.path.abspath('.'))
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.todo',
-    'sphinx.ext.pngmath',
-    'sphinx.ext.napoleon',
+    'sphinx.ext.pngmath'#,
+    # 'sphinx.ext.napoleon',
     # 'sphinx.ext.viewcode'
 ]
 #'sphinx.ext.doctest'
@@ -104,7 +104,7 @@ on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
 if on_rtd:
     html_theme = 'default'
 else:
-    html_theme = 'sphinx_rtd_theme'
+    html_theme = 'default'
 
 # 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