update utils readme.

Author: jedypod

utils/README.md

@@ -1,2 +1,8 @@
 # Utilities
-Here are a collection of utility tools for generating plots and visualizations.
+Here are a couple of utility DCTLs for doing basic operations in Resolve.
+
+## GamutConvert
+Converts from one gamut to another. Calculates a 3x3 Matrix at machine precision, does not rely on pre-defined matrices.
+
+## LogConvert
+Convert from to or from a log encoding. Implemented directly in code (no luts), so good precision. Includes links to the original source whitepapers where possible.