Add GA Page View plugin to list in ReadMe

Readme.rst

@@ -86,6 +86,8 @@ Filetime from Git         Uses Git commit to determine page date
 
 Footer Insert             Add standardized footer (e.g., author information) at end of every article
 
+GA Page View              Display Google Analytics page views on individual articles and pages
+
 Gallery                   Allows an article to contain an album of pictures
 
 Gist directive            This plugin adds a ``gist`` reStructuredText directive.