firebase-angular: Correct directive name

Obviously misprinted.
Miraculously worked overwriting the other `todoBlur` directive, and
"stealing" `todo-escape` attribute.

examples/firebase-angular/js/directives/todoEscape.js

@@ -5,7 +5,7 @@
  * Directive that executes an expression when the element it is applied to gets
  * an `escape` keydown event.
  */
-todomvc.directive('todoBlur', function () {
+todomvc.directive('todoEscape', function () {
 	var ESCAPE_KEY = 27;
 	return function (scope, elem, attrs) {
 		elem.bind('keydown', function (event) {