add module purchase_origin_address
split tests in travis
refactor the test of delivery address

Now setup is done in setUp, and the test methods contain only action +
assertion.
add myself to the contributors
remove checks: it is ignored on v8
Merge pull request #43 from yvaucher/8.0-add-purchase_origin_address

[8.0] add module purchase_origin_address
add missing remark and delivery_remark fields on views
Merge pull request #50 from yvaucher/8.0-display-delivery_remark

add missing remark and delivery_remark fields on views
add new module purchase_delivery_address

This is an extraction of dest_address_id field from module
purchase_requisition_bid_selection
break dependancy on purchase_delivery_address as this module can be used without it
change complexity of module. Made it simple but not simpler.
set dropshipping when destination is a customer