CSV import annoyances

[mjashanks]

1. When uploading a CSV, I had columns like "created_at". I wanted to name the column "Created At".
2. I had an "Apps Created" column, which is a number, but had lots of entries like "NULL". The import failed because of these.

These are minor annoyances that men I have to edit my spreadsheet. It would be nice if

• We could rename columns in the builder, on import
• The import would ignore non-parsable numbers
• When an import fails, it would give a reason why