graphing: add pure graph table, ranges, and argv builders

test/Main.hs

@@ -7,6 +7,7 @@ import qualified BackoffProp
 import qualified BedroomSpec
 import qualified BusSpec
 import qualified ConnectionSpec
+import qualified GraphingSpec
 import qualified MetricsSpec
 import qualified RuntimeSpec
 import qualified SupervisorSpec
@@ -18,6 +19,7 @@ main = hspec $ do
   BedroomSpec.spec
   BusSpec.spec
   ConnectionSpec.spec
+  GraphingSpec.spec
   MetricsSpec.spec
   RuntimeSpec.spec
   SupervisorSpec.spec