support destructuring in AssignmentStatement and ForOf loops

test/fixtures/destructuring/assignment/actual.js

@@ -0,0 +1 @@
+[a, b] = f();

test/fixtures/destructuring/assignment/expected.js

@@ -0,0 +1,3 @@
+var _ref = f();
+a = _ref[0];
+b = _ref[1];

test/fixtures/destructuring/for-in/actual.js

@@ -0,0 +1,3 @@
+for (var [name, value] in obj) {
+  print("Name: " + name + ", Value: " + value);
+}

test/fixtures/destructuring/for-in/expected.js

@@ -0,0 +1,4 @@
+for (var name in obj) {
+  var value = obj[name];
+  print("Name: " + name + ", Value: " + value);
+}

test/fixtures/destructuring/for-of/actual.js

@@ -0,0 +1,3 @@
+for (var [ name, before, after ] of this.test.expectation.registers) {
+
+}

test/fixtures/destructuring/for-of/expected.js

@@ -0,0 +1,5 @@
+for (var _iterator = this.test.expectation.registers[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
+  var name = _step.value[0];
+  var before = _step.value[1];
+  var after = _step.value[2];
+}