[IMP] Courtesy of kevin3274 issue 1258: orderpoint should have float multiple instead of integer
Merge pull request #2178 from odoo-dev/8.0-wmsmultiop-jco

[IMP] Courtesy of kevin3274 issue 1258: orderpoint should have float mul...
[FIX] account: invoiced button values must be calculated as the user

Otherwise, if done with the superuser:
 - The multi-company rules won't work, the user will have the amount of all invoices, cross-companies
 - The amount currency will always be the currency of the superuser
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-win32