Kill Bill currency conversion plugin apis

'org.kill-bill.billing.plugin:killbill-plugin-api-currency:0.7.0'

<dependency>
	<groupId>org.kill-bill.billing.plugin</groupId>
	<artifactId>killbill-plugin-api-currency</artifactId>
	<version>0.7.0</version>
</dependency>

<dependency org="org.kill-bill.billing.plugin" name="killbill-plugin-api-currency" rev="0.7.0"/>

"org.kill-bill.billing.plugin", "killbill-plugin-api-currency", "0.7.0"