Updated README.

README.md

@@ -88,9 +88,11 @@ To publish a new version of Klaro to NPM, simply run
 
 To generate a new tagged release, simply run
 
- make release version=x.x.x
+ make release [patch|minor|major]
 
-where `x.x.x` is the version that you want to publish.
+If no argument is given, a 'patch' release will be created. The release mechanism will not run if
+the working directory isn't clean. If it is, a Python script will increase the version number in
+the `package.json` file, rebuild the `dist` files, create a new commit and tag it with the version.
 
 ## Contributing