link to 2.12.x nightly build

updated copyright to 2017

Author: Philippus

_includes/footerbar.txt

@@ -3,7 +3,7 @@
 		<ul>
 			<li><h5>API</h5></li>
 			<li><a href="http://www.scala-lang.org/api/current/">Current</a></li>
-			<li><a href="http://www.scala-lang.org/files/archive/nightly/2.11.x/api/2.11.x/">Nightly</a></li>
+			<li><a href="http://www.scala-lang.org/files/archive/nightly/2.12.x/api/2.12.x/">Nightly</a></li>
 		</ul>
 		<ul>
 			<li><h5>Learn</h5></li>
@@ -29,7 +29,7 @@
 	</div>
 	<div class="container copyright">
  		<p>
-			Copyright &copy; 2011-2015 EPFL. All rights reserved.
+			Copyright &copy; 2011-2017 EPFL. All rights reserved.
 			<a href="https://github.com/scala/scala.github.com/commits/gh-pages.atom"><img align="right" height="20px" width="20px" src="{{ site.baseurl }}/resources/images/rss.png" alt="RSS feed of updates to the github repo hosting this site"></a>
 		</p>
 	</div>

_includes/topbar.txt

@@ -10,7 +10,7 @@
                       <a href="#" class="menu">API</a>
                       <ul class="menu-dropdown">
                         <li><a href="http://www.scala-lang.org/api/current/">Current</a></li>
-                        <li><a href="http://www.scala-lang.org/files/archive/nightly/2.11.x/api/2.11.x/">Nightly</a></li>
+                        <li><a href="http://www.scala-lang.org/files/archive/nightly/2.12.x/api/2.12.x/">Nightly</a></li>
                         <!--<li class="divider"></li>
                         <li><a href="#">Previous Versions</a></li>
                         -->