Feature/983 data importer

# Warning

# Info

The release includes the new NPSP Data Importer, which helps you easily import your data into the Nonprofit Starter Pack

# Issues

Fixes #983 
Fixes #1020 
Fixes #1015 
Fixes #1014 


I wanted to have my additional information about number of records processed, imported, and failed inside the status panel.  WhenI first used the component, and had this data outside the component, I was then forced to have another action poller.  I was uncomfortable having two pollers on the same page, and wanted the UI to look more unified and polished.  I also didn't want the title to say success when in fact there were import errors.