Merge pull request #1724 from richardmiller/updating_cookbook_article_name

Updated cookbook title to match the usual format and added index entries

Author: weaverryan

cookbook/doctrine/resolve_target_entity.rst

@@ -1,5 +1,9 @@
-Defining Relationships with Abstract Classes and Interfaces
-===========================================================
+.. index::
+   single: Doctrine; Resolving target entities
+   single: Doctrine; Define relationships with abstract classes and interfaces
+
+How to Define Relationships with Abstract Classes and Interfaces
+================================================================
 
 .. versionadded: 2.1
     The ResolveTargetEntityListener is new to Doctrine 2.2, which was first
@@ -155,4 +159,4 @@ Final Thoughts
 With the ``ResolveTargetEntityListener``, you are able to decouple your
 bundles, keeping them usable by themselves, but still being able to
 define relationships between different objects. By using this method,
-your bundles will end up being easier to maintain independently.
+your bundles will end up being easier to maintain independently.