README: mention that the idea came from John Whitley

diff --git a/README b/README
index bc44f6e..93010e2 100644 (file)
--- a/README
+++ b/README
@@ -1,6 +1,8 @@
 vcsh configuration to handle collisions of files common to distinct vcsh
 repositories using the sparse-checkout functionality of git.
 
+Based on John Whitley's setup at https://github.com/jwhitley/vcsh-root
+
 The patterns for the colliding files are in .config/vcsh/sparse-checkout and
 a pre-upgrade hook is used to make vcsh repositories use it.