Squashed commit of the following:

commit ec8757d9cbc6ab59b4a2ed56e06b0ab2c4a5a562
Author: Adrian Vasiliu <vasiliu@fr.ibm.com>
Date:   Mon Jan 13 17:03:44 2014 +0100

    Taking into account Bill's comments

commit 9bb02a4c41847b9cbe1ab53132a9b281aaa4bc46
Author: Adrian Vasiliu <vasiliu@fr.ibm.com>
Date:   Thu Jan 9 17:02:07 2014 +0100

    delite/Scrollable mixin