class Middleman::Extension

def expose_to_template(*symbols)
  self.exposed_to_template ||= {}
  if symbols.first && symbols.first.is_a?(Hash)
    self.exposed_to_template.merge!(symbols.first)
  elsif symbols.is_a? Array
    symbols.each do |sym|
      self.exposed_to_template[sym] = sym
    end
  end
end