[gimp-web/gimp-web-static] Added links to prehistory and ancient_history on about page

[Pat David <patdavid src gnome org>]

commit 61dbd18c02b35b11e2c211b0ed7e140b2c8c358d
Author: Pat David <patdavid gmail com>
Date:   Mon Aug 10 17:12:45 2015 -0500

    Added links to prehistory and ancient_history on about page

 content/about/index.md |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/content/about/index.md b/content/about/index.md
index 3a127bd..61326f7 100644
--- a/content/about/index.md
+++ b/content/about/index.md
@@ -16,10 +16,12 @@ The terms of usage and rules about copying are clearly listed in the [GNU Genera
 
 ## GIMP History
 
-* Prehistory - until GIMP 0.54 in 1996
-* Ancient History - until GIMP 1.0 in 1998
+* [Prehistory][] - until GIMP 0.54 in 1996
+* [Ancient History][] - until GIMP 1.0 in 1998
 * History - from 1.0 to the current GIMP
 
+[Prehistory]: {filename}prehistory.md
+[Ancient History]: {filename}ancient_history.md
 
 
 ## GIMP Stuff