Support currencies

[chargio]

User Story

As a user, I want to see the rates in different currencies.
It will be possible to define rates in any currency in https://en.wikipedia.org/wiki/List_of_circulating_currencies

Impacts

API, UI, Docs

Role

User

Assumptions

• Rates are applied with a currency.
• It is possible to convert between currencies to show the result in any currency.
• The user has a preferred currency in its profiles

UI Details

It should be possible to show different currencies in the interface.
The user will be able to restrict the currencies shown in the price plan editor (future)

Acceptance Criteria

• The user can define a price plan in different currencies.
• The results of rating can be done in any currency. IN the case where the original currency is not the currency of the account, both the original and the new will be avaialble (inc. the conversion rate)

[chambridge]

What is a price plan? Trying to get clarity on expected inputs/outputs.

Its not clear from #3

[chargio]

https://github.com/project-koku/kokudaka/wiki/Price-Plan

There is a wiki with all the concepts explained