subtree info

diff --git a/libs/subtree.txt b/libs/subtree.txt
new file mode 100644 (file)
index 0000000..2de0209
--- /dev/null
+++ b/libs/subtree.txt
@@ -0,0 +1,5 @@
+# Subtrees
+
+One subtree is used for this program:
+       ```git subtree add -P src/be/nikiroo/utils git@github.com:nikiroo/nikiroo-utils.git subtree```
+