A year and a half after Currencycloud raised $80 million in a round that included Visa, the London-based developer of APIs that powered remittance and currency exchange services is getting even closer to the financial services giant. Today, Visa announced that it would acquire CurrencyCloud in a deal valued at $963 million (£700 million). This price is a very decent leap from that last funding round, when sources told us the startup was valued at around $500 million. (As Visa already has equity in the company, the amount it will…