add Changelog in about.html - Closes #147

assets/about.html

@@ -23,6 +23,16 @@ function show(n) {
 <p><b>Version:</b> 0.9.42 released Mar. 13, 2015<br><br>
 <b>Website:</b> <a href='https://github.com/vanilla-music/vanilla'>https://github.com/vanilla-music/vanilla</a><br>
 <b>Issue tracker:</b> <a href='https://github.com/vanilla-music/vanilla/issues'>https://github.com/vanilla-music/vanilla/issues</a><br>
+<br>
+<b>Changelog</b> [<a href='javascript:show("changelog")'>show</a>]
+<pre id='changelog'>
+<b>0.99</b>
+- <b>NEW</b> Material design
+- <b>NEW</b> Native searchview
+- <b>NEW</b> <i>Empty queue</i> option in Queue screen
+- <b>NEW</b> Gradle / Android Studio support by @AltNico
+- <b>FIX</b> Enqueue bug introduced in 0.9.42
+</pre>
 <h2>Contributors</h2>
 <ul>
 	<li>Adrian Ulrich</li>