Refactor travis testing

src/nat/BoolExpInterp.hx

@@ -0,0 +1,20 @@
+package nat;
+
+import kiss.KissInterp;
+import hscript.Parser;
+import kiss.Prelude;
+
+@:build(kiss.Kiss.build())
+class BoolExpInterp extends KissInterp {
+    public function new() {
+        super();
+    }
+
+    override function resolve(id:String):Dynamic {
+        return try {
+            super.resolve(id);
+        } catch (e:Dynamic) {
+            false;
+        }
+    }
+}