[ADD] account_payment_multicurrency module
[FIX] use super instead of function recreated from scratch
[ADD] conflicts tag , this module do not need to be add to account_banking_payment_export
[IMP] Code impovement
[FIX] add context safe guard
[FIX] copy the context before update it
[FIX] typo
Merge pull request #69 from vrenaville/dev-payment_multicurrency

[ADD] account_payment_multicurrency module