[docs] Fix typo, add link to Tom's Twitter profile

docs/tutorial/3-class-based-views.md

@@ -7,7 +7,7 @@ We can also write our API views using class based views, rather than function ba
 We'll start by rewriting the root view as a class based view.  All this involves is a little bit of refactoring.
 
     from blog.models import Comment
-    from blog.serializers import ComentSerializer
+    from blog.serializers import CommentSerializer
     from django.http import Http404
     from djangorestframework.views import APIView
     from djangorestframework.response import Response

docs/tutorial/6-resource-orientated-projects.md

@@ -44,6 +44,6 @@ We've reached the end of our tutorial.  If you want to get more involved in the
 
 * Contribute on GitHub by reviewing issues, and submitting issues or pull requests.
 * Join the REST framework group, and help build the community.
-* Follow me on Twitter and say hi.
+* Follow me [on Twitter](https://twitter.com/_tomchristie) and say hi.
 
 Now go build something great.
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