[ADD] module delivery_carrier_label_postlogistics_shop_logo
[MRG] changes from add delivery_carrier_label_postlogistics prerequisite branche
[IMP] __openerp__ description
[REF] replace dummy copied function by clean inheritance of _generate_postlogistics_label method
[FIX] description reStructured title in __openerp__.py
[FIX] as it changed in dependancies must inherit of stock.picking instead of stock.picking.out
[IMP] set _generate_postlogistics_label inheritable
[ADD] an optional parameter 'tracking_ids' so we can decide to generate the label only for a selection of packs in a picking
[ADD] use the new parameter 'tracking_ids' to generate only the labels of the trackings given in tracking_ids if used.

The implementation by default still generate them all at once from a button, but for instance the module allowing to print labels of a dispatch use it
[ADD] an optional parameter 'tracking_ids' so we can decide to generate the label only for a selection of packs in a picking
the button call action_generate_carrier_label() without the 'context' keyword argument so the context ends in the tracking_ids argument. So the method now conforms to the cr, uid, ids, context signature and just forwards to a new generate_labels() method that should be used from within the code
use the name of the picking when there is no pack
[ADD] an optional parameter 'tracking_ids' so we can decide to generate the label only for a selection of packs in a picking
[FIX] make sure pack number (which can be picking name) has no unallowed character for item id of postlogistics label
[IMP] add descrption field to carrier option
When tracking_ids is defined, generate one default label per tracking id
[IMP] complete translation and fix view
[FIX] postlogistics warnings unwrapping
Improve description
Improve file_type selection field inheritance