Add compare_bench.py documentation. Fixes #309 (#318)

diff --git a/README.md b/README.md
index 9109430..2cfb70b 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@
 
 [Known issues and common problems](#known-issues)
 
+[Additional Tooling Documentation](docs/tools.md)
+
 ## Example usage
 ### Basic usage
 Define a function that executes the code to be measured.