Update Ember.js documentation (2.9.1)

lib/docs/filters/ember/clean_html.rb

@@ -84,6 +84,10 @@ module Docs
       def guide
         @doc = at_css('article')
 
+        if root_page?
+          at_css('h1').remove
+        end
+
         css('.previous-guide', '.next-guide').remove
 
         css('img').each do |node|

lib/docs/scrapers/ember.rb

@@ -5,8 +5,8 @@ module Docs
     self.name = 'Ember.js'
     self.slug = 'ember'
     self.type = 'ember'
-    self.release = '2.8.2'
-    self.base_urls = ['http://emberjs.com/api/', "https://guides.emberjs.com/v2.8.0/"]
+    self.release = '2.9.1'
+    self.base_urls = ['http://emberjs.com/api/', 'https://guides.emberjs.com/v2.9.0/']
     self.links = {
       home: 'http://emberjs.com/',
       code: 'https://github.com/emberjs/ember.js'