add(named): an Es setoid rewriting layer with the modulo reduction (M5 metatheory)

scripts/extract_metadata.py

@@ -25,6 +25,10 @@ MILESTONE = {
     "Substitution": "M2",
     "Subsystem": "M3",
     "Parallel": "M4",
+    "Metaterm": "M5",
+    "NamedMeta": "M5",
+    "NamedEs": "M5",
+    "NamedMeasure": "M5",
     "Tests": "M2",
     "Random": "M2",
     "Enumerate": "M2",