[gimp-web/testing] Added GIMP 2.8.20 source

[Michael Schumacher <schumaml src gnome org>]

commit dffd863629f28de9a49a49049447161d804fb4f5
Author: Michael Schumacher <schumaml gmx de>
Date:   Thu Feb 2 00:40:34 2017 +0100

    Added GIMP 2.8.20 source

 GIMP_VERSIONS |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/GIMP_VERSIONS b/GIMP_VERSIONS
index 08f4e31..083e2a8 100644
--- a/GIMP_VERSIONS
+++ b/GIMP_VERSIONS
@@ -1,6 +1,12 @@
 {
     "STABLE":  {
 
+       "2.8.20": {
+            "source": { 
+                "gimp-2.8.20.tar.bz2": "d405640c426b234d6efc36fb4f5bae57"
+                },
+           },
+
         "2.8.18": {
             "source": { 
                 "gimp-2.8.18.tar.bz2": "5adaa11a68bc8a42bb2c778fee4d389c"