Minor docs tweaks to titles and citations

docs/topics/2.2-announcement.md

-# REST framework 2.2 announcement
+# Django REST framework 2.2
 
 The 2.2 release represents an important point for REST framework, with the addition of Python 3 support, and the introduction of an official deprecation policy.
 

docs/topics/2.3-announcement.md

-# REST framework 2.3 announcement
+# Django REST framework 2.3
 
 REST framework 2.3 makes it even quicker and easier to build your Web APIs.
 

docs/topics/2.4-announcement.md

-# REST framework 2.4 announcement
+# Django REST framework 2.4
 
 The 2.4 release is largely an intermediate step, tying up some outstanding issues prior to the 3.x series.
 

docs/topics/rest-framework-2-announcement.md

-# Django REST framework 2
-
-What it is, and why you should care.
+# Django REST framework 2.0
 
 > Most people just make the mistake that it should be simple to design simple things.  In reality, the effort required to design something is inversely proportional to the simplicity of the result.
 >

docs/topics/third-party-resources.md

 # Third Party Resources
 
+> Software ecosystems […] establish a community that further accelerates the sharing of knowledge, content, issues, expertise and skills.
+>
+> — [Jan Bosch][cite].
+
 ## About Third Party Packages
 
 Third Party Packages allow developers to share code that extends the functionality of Django REST framework, in order to support additional use-cases.
@@ -260,7 +264,7 @@ To submit new content, [open an issue][drf-create-issue] or [create a pull reque
 * [Web API performance: profiling Django REST framework][web-api-performance-profiling-django-rest-framework]
 * [API Development with Django and Django REST Framework][api-development-with-django-and-django-rest-framework]
 
-
+[cite]: http://www.software-ecosystems.com/Software_Ecosystems/Ecosystems.html
 [cookiecutter]: https://github.com/jpadilla/cookiecutter-django-rest-framework
 [new-repo]: https://github.com/new
 [create-a-repo]: https://help.github.com/articles/create-a-repo/