Add blurb to README.md about auto-enable of development mode

Author: adamlundrigan

README.md

@@ -46,6 +46,11 @@ configuration in `config/autoload/development.local.php.dist`. Enabling
 development mode will copy these files to versions removing the `.dist` suffix,
 while disabling development mode will remove those copies.
 
+Development mode is automatically enabled as part of the skeleton installation process. 
+After making changes to one of the above-mentioned `.dist` configuration files you will
+either need to disable then enable development mode for the changes to take effect,
+or manually make matching updates to the `.dist`-less copies of those files.
+
 ## Running Unit Tests
 
 To run the supplied skeleton unit tests, you need to do one of the following: