Currencies Potentially Missing

Hi I am putting together a basic geography resource for Currency, Country, City. I'm using your resource for Currency and RestCountries.eu for Countries.

When I ran a comparison I found 5 currencies which are included in RestCountries but not your list so I thought you might find it useful for me to highlight them, in case they are not missing for a reason...

BYN - New Belarussian Ruble (You have the old one BYR)
XAF - Central African Franc
CDF - Congalese Franc
SHP - St Helena Pound
STD - Sao Thom and Principle Dobra.

[kybarg]

BYN was fixed in #11

[joeyhub]

MRU is also missing.

If possible, it would also be great to try to include if the currency is still in circulation or not (retired from ISO I guess).

[joeyhub]

Some mapping mechanism might also be helpful.

It's a bit tricky with historic data. If you take BYR going to BYN for example... anything removed can break integrity for any historic data.

I think BYN should have actually resulted in a new entry rather than an old one, with maybe some mapping info on the old. Such as retired and replaced with....