Ad notes section

README.md

@@ -1,3 +1,9 @@
-# learn_golang
+# Learn Golang
+
+Following the O'Reilly "Learning Go: An Idiomatic Approach to Real-World Go Programming"
+
+## Notes
+
+- The use of `./...` denotes a wildcard for tools like `go fmt`. It matches all .go files in the current directory and it's subdirectories.
+
 
-# Learn GoLang