[FIX] report add the humanreadable option to barcode image generator

Closes #4334
[FIX] product: variants prices (extra price) digits precision

When adding an extra price for a variant (through the button variant prices in the product template form) with a digits precision greater than 2 (4 for instance), the computed public price did not keep the digits precision of the extra price
[FIX] payment_buckaroo: brq_test expects boolean
[FIX] website_sale: compute base price from default company currency to user currency to display the good lst_price or price extra
Merge pull request #26 from odoo/8.0

update all commits