restore local SwiftCSV pending further investigation

move to earlier version of SwiftCSV that doesn't break importers

updated to SwiftCSV mainline

further improvements

rely on local fork of external package

Additional reworking of the history importers to reduce the number of…

… rejected rows (#15)

Update the Fido (Fidelity) history importer to support security transfers where no share price is specified.

Rework the history importers to reduce the number of rejected rows (#14)

This mostly affects the history importers (for Chuck and Fido).

Ignore "total" rows.

More consistent handling of action types, such as for transfers.

More comprehensive tests.

for delimited, render nil as blank

moved back to mainline SwiftCSV

sorting package issues