picking_dispatch extension with a picking-oriented use

Original Launchpad MP : https://code.launchpad.net/~camptocamp/stock-logistic-flows/7.0-picking_dispatch_picking_oriented_use-rde/+merge/215147

It adds a picking dispatch extension, with a picking_oriented use.
Description:
    The picking_dispatch addon is stock move-oriented.
    This addon changes it for a picking-oriented use.
    On "Done" button, a wizard is displayed (same as picking_dispatch), but:
    - moves are not passed to "done" state, but splitted between picked quantity and remains.
    - unpicked moves are moved in a new backorder.
    Then, when the picking dispatch state is done :
    - the picking dispatch hides the "Stock Moves" tab, to deliver, the user uses "Related Picking" tab
    - the "Transfer Products" wizard ("Deliver" button) displays only moves linked to a done picking dispatch.