Update README to reflect change to .env

Author: mkrause

README.md

@@ -28,12 +28,12 @@ root you'll need to adjust the path in `wf`.
 The first time you try to run workflow you'll run into the following error:
 
 > Couldn't find local configuration. Please create and modify
-> 'config/params.sh' or run the 'install' command.
+> '.env' or run the 'install' command.
 
 This means that you haven't configured workflow yet. Projects will usually
 have machine-dependent configuration, including sensitive information like
 passwords, or just for personal preferences (e.g. your preferred editor).
-There should be a template available in `config/params.sh.dist` which you
+There is a template available at `.env.example` which you
 can copy and customize (or run `./wf install`).
 
 ### Adding new commands