[FIX] report: /report/download route should not be website enabled

There's a little magic inside the website enabled route modifying the
context's lang, thus breaking the logic to print the report in the
current user's lang. The direct route to display the report should
stay in website_enabled mode, as it allows to switch lang, use the
website translator and so on.
[IMP] Old hack where uom_id had to be empty in on_change

[IMP] Add purchase order origin on picking

[WIP] Picking type on move for location on routing

[IMP] Provide extra function for custom buttons on picking

[IMP] Action assign optim

[IMP] Push apply should take invoice_state into account.  Propagation of cancel of stock moves should depend on procurement rule
[IMP] Make sure property_ids on sale order line are visible and able to work
[IMP] Inter-company pricing: put price on move when only partner and not connected to sale or purchase + invoice_state inverse function
[WIP] Pricelist of purchase is not in stock only and remove product_manufacturer module in view + manufacturer
[IMP] Patch for boms that explode in boms to have the correct quantities courtesy of chm
[FIX] When purchase, do not overwrite price
[IMP] Put wkf_action_cancel back, so the method does not call itself recursively (issue 2079)
[IMP] Invoice_state on move and search custom picking type
[WIP] Improve views for qty available + forecast qty in product and product template tree views
[IMP] Implement comments on pull request
[FIX] Bom qty
[IMP] Solve landed costs bug + invoice_state in account_anglo_saxon.yml
Merge pull request #2292 from odoo-dev/8.0-wmsstaging8-jco

8.0 wmsstaging8 jco
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-win32