Update Knockout.js documentation (3.1.0)

lib/docs/filters/knockout/entries.rb

@@ -9,7 +9,8 @@ module Docs
         'json-data'                                       => 'JSON data',
         'extenders'                                       => 'Extending observables',
         'unobtrusive-event-handling'                      => 'Event handling',
-        'fn'                                              => 'Custom functions' }
+        'fn'                                              => 'Custom functions',
+        'ratelimit-observable'                            => 'rateLimit extender' }
 
       def get_name
         return NAME_BY_SLUG[slug] if NAME_BY_SLUG.has_key?(slug)

lib/docs/scrapers/knockout.rb

@@ -3,7 +3,7 @@ module Docs
     self.name = 'Knockout.js'
     self.slug = 'knockout'
     self.type = 'knockout'
-    self.version = '3.0.0'
+    self.version = '3.1.0'
     self.base_url = 'http://knockoutjs.com/documentation/'
     self.root_path = 'introduction.html'
 
@@ -15,7 +15,6 @@ module Docs
     options[:only] = %w(
       json-data.html
       extenders.html
-      throttle-extender.html
       unobtrusive-event-handling.html
       fn.html)