FEATURE: Adds ~200 more emoji

This includes all new emoji from Unicode 7 and Unicode 8 with the
exception of skin tones which will require a new interface.

spec/components/pretty_text_spec.rb

@@ -404,7 +404,7 @@ HTML
     end
 
     it "replaces some glyphs that are not in the emoji range" do
-      expect(PrettyText.cook("☺")).to match(/\:slightly_smiling\:/)
+      expect(PrettyText.cook("☺")).to match(/\:slight_smile\:/)
     end
 
     it "doesn't replace unicode emoji if emoji is disabled" do