Add a protective require

This commit is contained in:
Ben Hollis 2014-06-22 20:46:39 -07:00
parent fe5247d9d9
commit 5c991ba4dc

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@ -1,5 +1,6 @@
require 'active_support/core_ext/module/delegation'
require 'active_support/core_ext/class/attribute'
require 'middleman-core/configuration'
module Middleman
class Extension