Merge pull request #150 from dregin/master

website: Just fixing a small error in the text.

website/source/docs/templates/introduction.html.markdown

@@ -33,8 +33,8 @@ Along with each key, it is noted whether it is required or not.
   information on how to define and configure a provisioner, read the
   sub-section on [configuring provisioners in templates](/docs/templates/provisioners.html).
 
-* `post-processors` (optional) is an array of that defines the various
-  post-processing steps to take with the built images. This is an optional
+* `post-processors` (optional) is an array of one or more objects that defines the 
+  various post-processing steps to take with the built images. This is an optional
   field. If not specified, then no post-processing will be done. For more
   information on what post-processors do and how they're defined, read the
   sub-section on [configuring post-processors in templates](/docs/templates/post-processors.html).