README.md in trufflepig-0.2.11 vs README.md in trufflepig-0.2.12

@@ -29,15 +29,28 @@
 feature as well as browser compatibility tables, and links to more info.
 
 ## Adding or updating detection patterns
 
 Add or update patterns with the correct caniuse.com key to
-[data/patterns.json](https://github.com/5apps/trufflepig/blob/master/data/patterns.json).
+[data/patterns.json](https://github.com/5apps/trufflepig/blob/master/data/patterns.json)
+by running:
+
+```
+rake featurelist:fetch
+```
+
 The build task will merge that list with the source JSON and create
 data/features.json which will be used by the search:
 
 ```
 rake featurelist:build
+```
+
+For convenience there is also a task that combines the two previous
+ones:
+
+```
+rake featurelist:update
 ```
 
 ## To do
 
 * Respect filetypes when scanning for features (e.g. don't look for CSS