add more detail to the compare script; add level 4 and 5

l4/1_overlay/README

@@ -0,0 +1 @@
+I want to be part of the INDEX

l4/1_overlay/_Instructions.txt

@@ -0,0 +1,2 @@
+1) you played around a bit with the code and nothing works anymore. Now you want to go back to exaclty how the code is on the last commit. 
+- Make sure you also get git to remove any unversioned files.  

l4/1_overlay/myScript.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+echo"Hello world!" < tee -a execLog.dat

l4/1_overlay/test/testing.txt

@@ -0,0 +1 @@
+/