fix variable misname issue that broke stereo rendering, add information about shader to readme

Author: dbastienMS

Assets/HoloToolkit/Utilities/README.md

@@ -64,6 +64,12 @@ Provides dynamic Text to Speech. Speech is generated using the UWP SpeechSynthes
 
 ### [Shaders](Shaders)
 
+### FastConfigurable.shader
+Very fast shader that uses the Unity light system.  Compiles down to only performing the operations you're actually using.  Uses material property drawers rather than a custom editor for ease of maintenance.
+
+#### HoloToolkitCommon.cginc
+Common shader functionality
+
 #### LambertianConfigurable.cginc
 Code shared between LambertianConfigurable.shader and LambertianConfigurableTransparent.shader.
 
@@ -73,6 +79,9 @@ Feature configurable per-pixel lambertian shader.  Use when higher quality light
 #### LambertianConfigurableTransparent.shader
 Feature configurable per-pixel lambertian transparent shader.  Use when higher quality lighting and transparency are desired, but specular highlights are not needed.
 
+#### macro.cginc
+Preprocessor macros to support shaders
+
 #### StandardFast.shader
 Higher performance drop-in replacement for the Unity Standard Shader.  Use when very high quality lighting (including reflections) is needed.
 

Assets/HoloToolkit/Utilities/Shaders/FastConfigurable.shader

@@ -211,7 +211,7 @@ Shader "HoloToolkit/Fast Configurable"
 			v2f vert(a2v v)
 			{
 				v2f o;
-				UNITY_SETUP_INSTANCE_ID(IN);
+				UNITY_SETUP_INSTANCE_ID(v);
 				UNITY_INITIALIZE_OUTPUT(v2f, o);
 				UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);