use new Kilt 0.3 syntax, add mention in readme for clarity

README.md

@@ -54,7 +54,7 @@ These results were achieved with ```wrk``` on a Macbook Pro Late 2013. (**2Ghz i
 - Middlewares
 - Built-in JSON support
 - Built-in static file serving
-- Built-in view templating via ecr
+- Built-in view templating via ECR (using [Kilt](https://github.com/jeromegn/kilt))
 
 # Documentation
 

src/kemal/helpers.cr

@@ -5,17 +5,16 @@ require "kilt"
 # get '/' do
 #   render 'hello.ecr'
 # end
-macro render(filename)
-  __view__ = String::Builder.new
-  Kilt.embed({{filename}}, "__view__")
-  __view__.to_s
-end
 
 macro render(filename, layout)
   content = render {{filename}}
   render {{layout}}
 end
 
+macro render(filename, *args)
+  Kilt.render({{filename}}, {{*args}})
+end
+
 def add_handler(handler)
   Kemal.config.add_handler handler
 end