Unable to databind to published title attribute on custom element

[alancutter]

If a custom element defines an attribute called "title" the templating system fails to databind to it.
Test case: http://jsfiddle.net/pbzg2ox8/3/

Tested on Chromium 40.0.2175.0 (Developer Build).

Expected output:

No title attribute
pony: hello
title: world

With title attribute
pony: hello
title: world

Actual output:

No title attribute
pony: hello
title: world

With title attribute
pony: hello
title: {{test.b}}

[ebidel]

Dupe of #379. See also #123.