[FIX] purchase: cancel PO lines and set related procurements in exception on cancelation of a PO
[FIX] base: Malaysian currency

Default Currency for Malaysia is MYR (Malaysian ringgit), not MXN (Mexican peso)
Fixes #4193
[FIX] sale_margin: margin handle included taxes for sale

Another fix should probably be build for purchase price, but it isn't that easy, we need to know the partner to which the product has been purchased, as taxes are partner/country dependent.

Besides, included taxes in purchase prices happen less often.
[MERGE] forward port of branch 7.0 up to f46fa1d
[MERGE] forward port of branch saas-3 up to 162eb84
[FIX] Report: don't shallow exceptions in report_download
[FIX] Report: html escape the error json string

session.get_file appends the json to the body of the generated iframe and
then tries to json.parse it by reading contentNode on the body.
Exceptions from `report_download` method may contain `<` and `>`, so when
json.parse tries to json.parse the contentNode, it reads only a part of
the original json string. htmlescaping the json string solves the issue
by preventing the content of the json string to be interpreted as html.
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64