[IMP] l10n_ch,account,website_sale: Add SwissQR Code on invoice and improve the SEPA QR Code usability

Purpose
=======

 - Add the SwissQR Code on the invoice in aim to replace the actual ISR
 - Improve the settings of the SEPA QR Code to make it more user friendly

Specifications
==============

 - ln_ch:

   - Add a SwissQR Code on the invoice to fit the Switzerland QR-Bill Format
   - Use the "partner_bank_id" field to generate the QR Code
   - Add function to get the address number out of the field "street" and "street2"

 - account:

   - Remove the SEPA QR Code's journal settings from the general setting
   - Display the "partner_bank_id" field on the invoice "Other info" page
   - Use the "partner_bank_id" field to generate the QR Code

 - website_sale:

   - Add a check box on the payment acquirers to use the SEPA QR Code on the e-commerce
   - Use the payment acquirer "journal_id" field to generate the SEPA QR Code

addons/payment/models/payment_acquirer.py

@@ -143,6 +143,7 @@ class PaymentAcquirer(models.Model):
     fees_dom_var = fields.Float('Variable domestic fees (in percents)')
     fees_int_fixed = fields.Float('Fixed international fees')
     fees_int_var = fields.Float('Variable international fees (in percents)')
+    qr_code = fields.Boolean('Use SEPA QR Code')
 
     # TDE FIXME: remove that brol
     module_id = fields.Many2one('ir.module.module', string='Corresponding Module')