Merge pull request #1588 from reyoung/feature/fix_font

Fix font issue in doc

Author: reyoung

doc_theme/static/css/override.css

@@ -1,3 +1,6 @@
+* {
+    font-family:"Roboto","Lato","proxima-nova","Helvetica Neue",Arial,sans-serif;
+}
 body {
     padding-top: 80px;
     background-image: none !important;