get all soql’ing of Recurring Donations to use the same helper routine to construct the Soql string (with custom field mappings and currencyiso fields).
error handling on Save method
error handling
added listRDCustomFieldMapping to service
added checkSettings to initial load of page
support for Recurring Donations Custom Field Mapping panel
Merge branch 'feature/208-settings-ui' of https://github.com/SalesforceFoundation/Cumulus into feature/208-settings-ui