[FIX #6]
[FIX #9]
[FIX #2]
Merge branch 'master' of github.com:odoo-l10n-ar/l10n_ar_invoice
[FIX #10]
[FIX #2]
[FIX #12]
Merge pull request #8 from morrillo/master

Fixes #6, #9 and #2