Updated version number on home page.

source/index.html.haml

@@ -7,7 +7,7 @@ description: Open-source framework for executing native Java code on the GPU.
   .row.center
     %a#download-button.btn-large.waves-effect.waves-light{:href => "/introduction/getting-started.html"} Get Started
   .row.center
-    %a.red-text.text-lighten-4{:href => "https://github.com/Syncleus/aparapi"} Release v1.5.0
+    %a.red-text.text-lighten-4{:href => "https://github.com/Syncleus/aparapi"} Release v1.7.0
   %br/
 
 - content_for :banner do