Other: Documentation update.

Author: DeanEdisGG

README.md

@@ -28,6 +28,8 @@ GLSL Shader Shrink will _not_:
 * Replace code with a 'more compressible' equivalent.
 * ...or otherwise '[GOLF](https://en.wikipedia.org/wiki/Code_golf)' anything.
 
+...although some of these items might be suggested as a 'hint'.
+
 ## Example (Shadertoy Starting Point)
 A small snippet of GLSL which shows **some** of the optimizations available.
 
@@ -98,6 +100,13 @@ This can be achieved using:
 
 ...and then use with Shadertoy, Bonzomatic, etc.
 
+---
+## Hints
+After shrinking your GLSL code, you might find some 'hints' are available.
+These range from 'this function isn't used' or 'this function is only used once, so you might like to inline it', all the way to some GOLFing hints.
+
+![Export](img/Hints.png?raw=true "Export")
+
 ---
 ## Limitations
 Despite a lot of effort spent trying to ensure the tool produces great output every time, there are always going to be edge cases caused by different coding styles and patterns of content.