Manifest.txt in liquid-2.2.0 vs Manifest.txt in liquid-2.2.1

@@ -1,9 +1,9 @@
 CHANGELOG
 History.txt
 MIT-LICENSE
 Manifest.txt
-README.txt
+README.md
 Rakefile
 init.rb
 lib/extras/liquid_view.rb
 lib/liquid.rb
 lib/liquid/block.rb