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 


It doesn't hurt anything, but dynamic SOQL no longer needs explicit namespacing. You can leave out the namespace and it will add it in the managed package.