Added bugs.ecmascript.org links. Fixes #4.

Fixes: #4

Thanks allenwb. The links are marked with Ⓑ.

anno.js

@@ -544,3 +544,36 @@ annotateHeadings(
     "x11.9":         [ "/note-2-ecmascript-equality-operators/" ]
   }
 );
+
+// B markers
+annotateHeadings(
+  "https://bugs.ecmascript.org/show_bug.cgi?id=",
+  "\u24b7",
+  "bugs",
+  {
+    "x7.9.1":             [ "8" ],
+    "x10.2.1.1.3":        [ "79" ],
+    "x10.5":              [ "78" ],
+    "x10.6":              [ "35", "115" ],
+    "x12.6.1":            [ "8" ],
+    "x13.1":              [ "174" ],
+    "x15":                [ "121" ],
+    "x15.12.3":           [ "81", "114" ],
+    "x15.3.4":            [ "181" ],
+    "x15.1.2.1.1":        [ "94" ],
+    "x15.4.2.2":          [ "84" ],
+    "x15.4.3.1":          [ "84" ],
+    "x15.4.4.3":          [ "62" ],
+    "x15.4.4.4":          [ "129", "131" ],
+    "x15.4.4.6":          [ "162" ],
+    "x15.4.4.7":          [ "131" ],
+    "x15.5.2.1":          [ "84" ],
+    "x15.5.4.11":         [ "97" ],
+    "x15.9.1.15":         [ "112" ],
+    "x15.11.6":           [ "9" ],
+    "x15.11.7":           [ "9" ],
+    "x15.12.2":           [ "82" ],
+    "x7.2":               [ "123" ],
+    "x7.3":               [ "123" ]
+  }
+);

index.html

@@ -47,7 +47,7 @@ <h2 id="top">Annotated ECMAScript 5.1 <span id="timestamp"></span></h2>
   statement. The source for this version is at
  <a href="https://github.com/es5/es5.github.com">https://github.com/es5/es5.github.com</a></p>
 
-<p id="annos">To view annotations, follow the <b>Ⓐ</b>, <b>Ⓓ</b>, <b>Ⓡ</b>,
+<p id="annos">To view annotations, follow the <b>Ⓐ</b>, <b>Ⓑ</b>, <b>Ⓓ</b>, <b>Ⓡ</b>,
   <b>Ⓖ</b>, <b>Ⓔ</b>, and <b>①</b> hyperlinks in the headings. A
   <a href="key.html">key to the markers</a> explains the different types
   of annotations.

key.html

@@ -28,6 +28,9 @@ <h3 id="key">Key to the markers</h3>
   the
   <a href="http://github.com/es5/es5.github.com/#readme">instructions on the Annotated ES5 project page</a>.</dd>
 
+<dt><b>Ⓑ</b> bugs.ecmascript.org issues</dt>
+<dd>Direct hyperlinks to <a href="https://bugs.ecmascript.org/">bugs.ecmascript.org</a> issues.</dd>
+
 <dt><b>Ⓓ</b> Dmitry A. Soshnikov ECMA-262 article series</dt>
 <dd>Direct hyperlinks to relevant articles by
     <a href="http://dmitrysoshnikov.com/">Dmitry A. Soshnikov</a> in his

style.css

@@ -32,9 +32,11 @@ a:hover {
 a.mdcr,
 a.mdcg,
 a.dmas,
+a.bugs,
 a.mdcr:visited,
 a.mdcg:visited,
-a.dmas:visited
+a.dmas:visited,
+a.bugs:visited
 {
   color: green;
 }