raise things when there's a yaml exception (non-zero exit code

lib/jekyll/convertible.rb

@@ -77,10 +77,7 @@ module Jekyll
       Liquid::Template.parse(content).render!(payload, info)
     rescue Exception => e
       Jekyll::Stevenson.error "Liquid Exception:", "#{e.message} in #{payload[:file]}"
-      e.backtrace.each do |backtrace|
-        puts backtrace
-      end
-      abort("Build Failed")
+      raise e
     end
 
     # Recursively render layouts