Update top links

- Remove developer version for now, pending benschwarz/developers.whatwg.org#104
- Add "Contribute on GitHub"
- Change "Change Log" from html5.org tracker to GitHub "Commit Log"
- Rename "View Open Bugs" to "Legacy Open Bugs"
- Add "Open Issues" linking to GitHub issues
- Rename "File a Bug" to "Open an Issue"

Fixes #5.

source

@@ -359,7 +359,12 @@
      <a href="https://whatwg.org/html"><span data-x=""><strong>Multipage Version</strong> <code data-x="">whatwg.org/html</code></span></a>
      <a href="https://html.spec.whatwg.org/"><span data-x=""><strong>One-Page Version</strong> <code data-x="">html.spec.whatwg.org</code></span></a>
      <a href="https://whatwg.org/pdf"><span data-x=""><strong>PDF Version</strong> <code data-x="">whatwg.org/pdf</code></span></a>
+     <!--
+
      <a href="https://developers.whatwg.org/"><span data-x=""><strong>Developer Version</strong> <code data-x="">developers.whatwg.org</code></span></a>
+
+     Put this back when https://github.com/benschwarz/developers.whatwg.org/issues/104 is fixed
+     -->
     </div>
     <div>
      <a class="misc" href="https://whatwg.org/faq"><span data-x=""><strong>FAQ</strong> <code data-x="">whatwg.org/faq</code></span></a>
@@ -369,11 +374,14 @@
      <!--<a class="comms" href="https://forums.whatwg.org/"><span data-x=""><strong>Join our Forums</strong> <code data-x="">forums.whatwg.org</code></span></a>-->
     </div>
     <div>
-     <!--<a class="changes" href="https://svn.whatwg.org/webapps"><span data-x=""><strong>SVN Repository</strong> <code data-x="">svn.whatwg.org/webapps</code></span></a>-->
-     <a class="changes" href="https://html5.org/tools/web-apps-tracker"><span data-x=""><strong>Change Log</strong> <code data-x="">html5.org's tracker</code></span></a>
-     <!--<a class="changes" href="https://twitter.com/WHATWG"><span data-x=""><strong>Twitter Updates</strong> <code data-x="">@WHATWG</code></span></a>-->
-     <a class="feedback" href="https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=UNCONFIRMED&amp;bug_status=NEW&amp;bug_status=ASSIGNED&amp;bug_status=REOPENED&amp;component=HTML&amp;product=WHATWG"><span data-x=""><strong>View Open Bugs</strong> <code data-x="">filed in Bugzilla</code></span></a>
-     <a class="feedback" href="https://whatwg.org/newbug" id="file-issue-link"><span data-x=""><strong>File a Bug</strong> <code data-x="">whatwg.org/newbug</code></span></a>
+     <a class="changes" href="https://github.com/whatwg/html"><span data-x=""><strong>Contribute on GitHub</strong> <code data-x="">whatwg/html repository</code></span></a>
+     <a class="changes" href="https://github.com/whatwg/html/commits/master"><span data-x=""><strong>Commit Log</strong> <code data-x="">on GitHub</code></span></a>
+     <a class="changes" href="https://twitter.com/htmlstandard"><span data-x=""><strong>Twitter Updates</strong> <code data-x="">@htmlstandard</code></span></a>
+    </div>
+    <div>
+     <a class="feedback" href="https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=UNCONFIRMED&amp;bug_status=NEW&amp;bug_status=ASSIGNED&amp;bug_status=REOPENED&amp;component=HTML&amp;product=WHATWG"><span data-x=""><strong>Legacy Open Bugs</strong> <code data-x="">filed in Bugzilla</code></span></a>
+     <a class="feedback" href="https://github.com/whatwg/html/issues"><span data-x=""><strong>Open Issues</strong> <code data-x="">filed on GitHub</code></span></a>
+     <a class="feedback" href="https://whatwg.org/newbug" id="file-issue-link"><span data-x=""><strong>Open an Issue</strong> <code data-x="">whatwg.org/newbug</code></span></a>
     </div>
    </nav>
   </header>