Float#round support for Rubinius

Manifest.txt

@@ -5,12 +5,14 @@ Rakefile
 bin/gin
 lib/gin.rb
 lib/gin/app.rb
+lib/gin/asset_manifest.rb
 lib/gin/asset_pipeline.rb
 lib/gin/cache.rb
 lib/gin/config.rb
 lib/gin/constants.rb
 lib/gin/controller.rb
 lib/gin/core_ext/cgi.rb
+lib/gin/core_ext/float.rb
 lib/gin/core_ext/gin_class.rb
 lib/gin/core_ext/rack_commonlogger.rb
 lib/gin/core_ext/time.rb

lib/gin.rb

@@ -125,6 +125,7 @@ def self.app_trace trace
 
   require 'gin/core_ext/cgi'
   require 'gin/core_ext/time'
+  require 'gin/core_ext/float'
   require 'gin/core_ext/gin_class'
   require 'gin/core_ext/rack_commonlogger'
 

lib/gin/core_ext/float.rb

@@ -0,0 +1,10 @@
+if Float.instance_method(:round).arity == 0
+class Float
+  undef round
+  def round ndigits=0
+    num, dec = self.to_s.split(".")
+    num = "#{num}.#{dec[0,ndigits]}".sub(/\.$/, "")
+    Float num
+  end
+end
+end