error handling and displaying for Data Importer
handle multiple DI records matching the same existing contact.
incremental UI improvements to Data Import page
redesign maps to lookup by key, to avoid creating dups that might be in the same di, a different di in the same batch, or a different di in another batch.
new fields for Contact1, Contact2, Account2.
new fields for Contact1, Contact2, Account2.
start of test code
Merge branch 'feature/983-data-importer' of https://github.com/SalesforceFoundation/Cumulus into feature/983-data-importer