Magento2 Data Migration version 0.1.15

Fixed to compatible with Magento 2 version 0.74.0 beta 13
Compatible:
Magento Community Edition (CE) versions: 1.6.x, 1.7.x, 1.8.x, 1.9.x
Magento 2 version 0.74.0 beta 12 and version 0.74.0 beta 13