set xpath as relative
do not rename button action_cancel as sale_stock fails
Merge pull request #21 from yvaucher/fix-sale_cancel_reason_view

[FIX] sale_cancel_reason: installation to be compatible with _sale_stock_
[ADD] new module sale_pricelist_restrict_product_in_so
sale_pricelist_restrict_product_in_so: Fix differents things :
* __init__.py not calling the function
* copyright in product.py
* context propagation
* noqa explained
sale_pricelist_restrict_product_in_so: remove uneeded #noqa
sale_pricelist_restrict_product_in_so: fix syntax error (found by flake8) : s/pool./pool/
Fix Flake8 errors

Conflicts:
	sale_send_pricelist_by_email/__init__.py
	sale_send_pricelist_by_email/product_pricelist.py
	sale_send_pricelist_by_email/report/__init__.py
	sale_send_pricelist_by_email/report/pricelist_version_report.py
handle price items based on other pricelists
80 char limit skipped my pep