CSVDataSourceEditor now uses local file attachments since parseCSV() is faster now.
CSVDataSourceEditor now uses local file attachments since parseCSV() is
faster now.

Change-Id: Ib08a8e131ae821efff019418f4de7c5e2a1247ed

WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS