added type grammar to readme, add example, del spho loc

example/ex5.msph

@@ -0,0 +1,21 @@
+nominal N
+nominal M
+
+
+type T[X, Y] = {
+	// body
+}
+
+type A = T[N, M] // binding X -> N, Y -> M
+type B = T[M, N] // binding X -> M, Y -> N
+
+// converted to
+
+type A = ⟨ X -> N, Y -> M ⟩ {
+	// body
+}
+type B = ⟨ X -> M, Y -> N ⟩ {
+	// body
+}
+
+