chore(doc-gen): generate docs for angular.io

You can generate docs for comsumption by the angular.io website by running:

```bash
gulp docs/angular.io
```

The generated docs can be found in `dist/angular.io`

docs/angular.io-package/services/renderMarkdown.js

@@ -0,0 +1,52 @@
+var marked = require('marked');
+var Encoder = require('node-html-encoder').Encoder;
+var html2jade = require('html2jade');
+var indentString = require('indent-string');
+var S = require('string');
+
+// entity type encoder
+var encoder = new Encoder('entity');
+
+
+
+/**
+ * @dgService renderMarkdown
+ * @description
+ * Render the markdown in the given string as HTML.
+ */
+module.exports = function renderMarkdown(trimIndentation) {
+
+  var renderer = new marked.Renderer();
+
+  renderer.code = function(code, lang, escaped) {
+
+    var cssClasses = ['prettyprint', 'linenums'];
+    var trimmedCode = trimIndentation(code);
+
+    if(lang) {
+      if(lang=='html') {
+        trimmedCode = encoder.htmlEncode(trimmedCode);
+      }
+      cssClasses.push(this.options.langPrefix + escape(lang, true));
+    }
+
+    return 'pre(class="' + cssClasses.join(' ') + '")\n'
+            + indentString('code.\n', ' ', 2)
+            + trimmedCode;
+  };
+
+  renderer.heading = function (text, level, raw) {
+    var headingText = marked.Renderer.prototype.heading.call(renderer, text, level, raw);
+    var title = 'h2 ' + S(headingText).stripTags().s;
+
+    if (level==2) {
+      title = '.l-main-section\n' + indentString(title, ' ', 2) ;
+    }
+
+    return title;
+  };
+
+  return function(content) {
+    return marked(content, { renderer: renderer });
+  };
+};