CSV import EN version

[arneman44]

When importing parts via the import tool and the English header the OrderNr column doesn't work.
When using the german Header it works without a problem.

this is on the 0.6 version

[andreww5au]

The problem is in inc/lib.import.php - lines 124 and 125 currently look like:
'bestellnummer' => 'part_supplierpartnr',
'ordernr' => 'ordernr',
Line 125 needs to be changed to look like:
'ordernr' => 'part_supplierpartnr',
Looks like the database column named, and that change was reflected in the German translation for the CSV column name, but not the English translation.