Move bootstrap theme to docs directory

docs/conf.py

@@ -119,7 +119,7 @@ todo_include_todos = True
 # a list of builtin themes.
 on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
 if on_rtd:
-    sys.path.insert(0, os.path.abspath('../'))
+    sys.path.insert(0, os.path.abspath('./'))
     import sphinx_bootstrap_theme
 
     html_theme = 'bootstrap'