Major Description
OpenExchangeRatesOrgProvider currently defaults the value of the "ratesFileLocation" init param to "http://openexchangerates.org/latest.json" – but that URL currently 301 redirects to a page with the following information...
Notice: App ID Required
As per public notices beginning June 2012, an App ID is required to access the Open Exchange Rates API. It's free for personal use, a bargain for your business. You can sign up here ยป
...so we should update the code to require users to be explicit about their URL (including APP_ID) or point to a local file. As things stand right now, anyone who configures this provider w/o explicitly setting ratesFileLocation ges a clean startup, but anytime they attempt to use the fieldtype to do a conversion they get an error that "No available conversion rate from USD to USD. Available rates are []"