[gimp-web/testing] Added Tone Mapping tutorial to list at /tutorials/

[Pat David <patdavid src gnome org>]

commit 631398de57bf794b4596906ca1bdebd312c8263a
Author: Pat David <patdavid gmail com>
Date:   Wed May 4 11:42:32 2016 -0500

    Added Tone Mapping tutorial to list at /tutorials/

 content/tutorials/index.md |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/content/tutorials/index.md b/content/tutorials/index.md
index 0276519..f70bb51 100644
--- a/content/tutorials/index.md
+++ b/content/tutorials/index.md
@@ -28,6 +28,10 @@ Detailed conversion tutorial for generating a B&W result from a color image.
 [Luminosity Masks][]  
 Using multiple layer masks to isolate specific tones in your image for editing.
 
+[Tone Mapping with 'Colors/Exposure'][]  
+Using high bit depth GIMP's 'Colors/Exposure' operation to add exposure compensation to shadows 
+and midtones while retaining highlight details.
+
 
 ## Programming
 
@@ -51,3 +55,4 @@ Import XCF images a directory at a time.
 [Layer Masks]: {filename}Layer_Masks/index.md
 [Luminosity Masks]: {filename}Luminosity_Masks/index.md
 [Simple Floating Logo]: {filename}Floating_Logo/index.md
+[Tone Mapping with 'Colors/Exposure']: {filename}Tone_Mapping_Using_GIMP_Levels/index.md