Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/apps/email/js/transition_end.js

@@ -0,0 +1,28 @@
+'use strict';
+
+/**
+ * transitionend is not guaranteed to be async after a layout recalulation.
+ * Specifically, a clientHeight read might trigger sync dispatch of
+ * transitionend event to listeners, which could end up calling the function
+ * that did the clientHeight, but the first call would still be stuck waiting
+ * on the clientHeight read to finish. The issue is tracked in bug 1135960. This
+ * is a workaround for that, to guarantee async dispatch by using the async
+ * nature of promise .then callbacks.
+ */
+define(function(require, exports, module) {
+  return function transitionEnd(node, fn, capturing) {
+    function asyncFn(event) {
+      Promise.resolve().then(function() {
+        fn(event);
+      })
+      .catch(function(error) {
+        console.error(error);
+      });
+    }
+    node.addEventListener('transitionend', asyncFn, capturing);
+
+    // Return the function used with addEventListener to allow the caller of
+    // this helper to later call removeEventListener.
+    return asyncFn;
+  };
+});