support raw property on tagged template literals - closes #164

test/fixtures/transformation/template-literals/tag/actual.js

@@ -1 +1 @@
-var foo = bar`a${ 42 }b ${_.foobar()}`;
+var foo = bar`wow\na${ 42 }b ${_.foobar()}`;

test/fixtures/transformation/template-literals/tag/expected.js

@@ -1,3 +1,11 @@
 "use strict";
 
-var foo = bar(["a", "b ", ""], 42, _.foobar());
+var _taggedTemplateLiteral = function (strings, raw) {
+  return Object.defineProperties(strings, {
+    raw: {
+      value: raw
+    }
+  });
+};
+
+var foo = bar(_taggedTemplateLiteral(["wow\na", "b ", ""], ["wow\\na", "b ", ""]), 42, _.foobar());