[DOC] Add a link to John Blanco's blog post.

README.markdown

@@ -6,6 +6,8 @@ Here's mogenerator's elevator pitch:
 
 > `mogenerator` is a command-line tool that, given an `.xcdatamodel` file, will generate *two classes per entity*. The first class, `_MyEntity`, is intended solely for machine consumption and will be continuously overwritten to stay in sync with your data model. The second class, `MyEntity`, subclasses `_MyEntity`, won't ever be overwritten and is a great place to put your custom logic.
 
+Want more detail? John Blanco has authored a [detailed writeup about mogenerator](http://raptureinvenice.com/getting-started-with-mogenerator/).
+
 ## Using mogenerator
 
 Senseful wrote up a [nice summary of mogenerator's command-line options](http://stackoverflow.com/questions/3589247/how-do-the-mogenerator-parameters-work-which-can-i-send-via-xcode).