Add a simple README.md file including an example use case

Author: nopuli265

README.md

@@ -1 +1,8 @@
-# rearrange
+# rearrange
+
+This module is used for rearranging names.
+Turns "LastName, FirstName" into "FirstName, LastName"
+
+# Example
+
+Calling `rearrange_name('Linh Ngo')` will return `'Ngo Linh'`