First crack, but with lots more to go

An only-partially-tested, lint-tests-only first draft. Sample output:

    $ tastetest -o xml ../smtp-momentum-relay/contrib/cookbook_repo/
    <testsuite errors="0" failures="21" name="TasteTest::Linters::FoodCritic" tests="1" time="0.073026">
        <testcase classname="TasteTest::Linters::FoodCritic" name="FC001: Use strings in preference to symbols to access node attributes">
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/directory.rb:1</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:4</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:6</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:8</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:10</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:12</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:14</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:16</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:18</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:20</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:22</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:24</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:26</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:28</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/attributes/order.rb:30</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/recipes/default.rb:9</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/recipes/default.rb:20</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/recipes/default.rb:46</failure>
            <failure>FC001: Use strings in preference to symbols to access node attributes: ../smtp-momentum-relay/contrib/cookbook_repo//cookbooks/smtp-momentum-loader/recipes/default.rb:47</failure>
        </testcase>
        <testcase classname="TasteTest::Linters::FoodCritic" name="FC002: Avoid string interpolation where not required">
        </testcase>
        <testcase classname="TasteTest::Linters::FoodCritic" name="FC003: Check whether you are running with chef server before using server-specific features">
        </testcase>
        <testcase classname="TasteTest::Linters::FoodCritic" name="FC004: Use a service resource to start and stop services">
       </testcase>

Obviously, lots more to do, but any feedback on the story so far is welcome...