fix: serve quartz with clean URL support and regenerate site

- Add serve.py to resolve clean Quartz URLs to .html files
- Regenerate Quartz site with correct baseUrl http://100.118.5.51:9120
- 196 HTML files emitted; all internal links now resolve

node_modules/underscore/amd/isElement.js

@@ -0,0 +1,10 @@
+define(function () {
+
+  // Is a given value a DOM element?
+  function isElement(obj) {
+    return !!(obj && obj.nodeType === 1);
+  }
+
+  return isElement;
+
+});