ADD: Wrote a little help text to the nonce2key tools.

diff --git a/tools/nonce2key/readme.txt b/tools/nonce2key/readme.txt
new file mode 100644 (file)
index 0000000..39ef9ae
--- /dev/null
+++ b/tools/nonce2key/readme.txt
@@ -0,0 +1,7 @@
+To test the nonce2key tool.
+
+:: tip
+You can use the output from "hf mf mifare"  to use with this tool. 
+
+:: sample
+./nonce2key e9cadd9c a8bf4a12 a020a8285858b090 050f010607060e07 5693be6c00000000