Use https everywhere we can. (#407)

Author: JoelMarcey

_static/css/pytorch_theme.css

@@ -112,7 +112,7 @@ footer p {
 }
 
 /* For hidden headers that appear in TOC tree */
-/* see http://stackoverflow.com/a/32363545/3343043 */
+/* see https://stackoverflow.com/a/32363545/3343043 */
 .rst-content .hidden-section {
     display: none;
 }

_static/doctools.js

@@ -76,7 +76,7 @@ jQuery.fn.highlightText = function(text, className) {
         var span;
         var isInSVG = jQuery(node).closest("body, svg, foreignObject").is("svg");
         if (isInSVG) {
-          span = document.createElementNS("http://www.w3.org/2000/svg", "tspan");
+          span = document.createElementNS("https://www.w3.org/2000/svg", "tspan");
         } else {
           span = document.createElement("span");
           span.className = className;
@@ -88,7 +88,7 @@ jQuery.fn.highlightText = function(text, className) {
         node.nodeValue = val.substr(0, pos);
         if (isInSVG) {
           var bbox = span.getBBox();
-          var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
+          var rect = document.createElementNS("https://www.w3.org/2000/svg", "rect");
        	  rect.x.baseVal.value = bbox.x;
           rect.y.baseVal.value = bbox.y;
           rect.width.baseVal.value = bbox.width;