README.md in exercism-0.0.19 vs README.md in exercism-0.0.20

@@ -27,9 +27,11 @@
 
     $ export EXERCISM_ENV=development
 
 Reveals stack traces on errors.
 
+By default, Exercism will create a config file in the base of your home directory, i.e. `~/.exercism`. This file can be moved to `~/.config/exercism` if desired.
+
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)