Merge pull request #23 from Xylopyrographer/Prefs-fix-Ver-Rel

For v1.7.2

Author: Xylopyrographer

v1.7.2 README.md

@@ -0,0 +1,21 @@
+# Version 1.7.2 README
+
+Minor bug fix release.
+
+No changes to the STAC code.
+
+Only change is to the modified Preferences.cpp file in the `/libraries/Preferences/ `folder.
+
+It was revised to correct a coding error in writing to the `log_e` file in 
+the `clear()` and `end()` methods.
+
+This bug would only show in a very very rare case should a commit to the NVS memory fail when calling one of those methods.
+
+If you did not replace the standard `Preferences.cpp` file with the modified one, there is nothing you need to do. The version running in your STAC is all good.
+
+If you did replace the standard `Preferences.cpp` file, follow the directions in the `libraries/libraries_README.md` file using this revised `Preferences.cpp` file. Then re-upload the STAC code into your ATOM and you're good to go.
+
+My apologies. Nothing like writing code to keep one humble.
+
+    \- Xylopyrographer  
+      2021-04-12