6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-generator/src/generators/classes.js

@@ -59,12 +59,16 @@ export function ClassProperty(node: Object) {
   this.semicolon();
 }
 
-export function MethodDefinition(node: Object) {
+export function ClassMethod(node: Object) {
   this.printJoin(node.decorators, node, { separator: "" });
 
   if (node.static) {
     this.push("static ");
   }
 
+  if (node.kind === "constructorCall") {
+    this.push("call ");
+  }
+
   this._method(node);
 }