add index of all gsoc 2012 posts

Author: Dane Springmeyer

_posts/blog/2012-10-06-gsoc2012-status9.md

@@ -5,7 +5,22 @@ author: Hermann Kraus
 category: Mapnik
 ---
 
-Google Summer of Code 2012 is over now. All the previous posts where rather
+Google Summer of Code 2012 is over now.
+
+Here is a list of all the previous posts:
+
+ - [Intro post: Improving support for non-latin languages](/news/gsoc2012)
+ - [Second post: Libraries](/news/gsoc2012-status)
+ - [Third post: First steps](/news/gsoc2012-status2)
+ - [Fourth post: Text processing](/news/gsoc2012-status3)
+ - [Fifth post: Half time](/news/gsoc2012-status4)
+ - [Sixth post: Line breaking](/news/gsoc2012-status5)
+ - [Seventh post: Point placements](/news/gsoc2012-status6)
+ - [Eighth post: Line placements and font sets](/news/gsoc2012-status7)
+ - [Ninth post: Collision detection, offsetting, and performance](/news/gsoc2012-status8)
+ - [Tenth post: Summary (this doc)](/news/gsoc2012-status9)
+
+All the previous posts where rather
 technical so I would like to talk about applications and show some beautiful
 images in this post.