Import Clients
Supported columns:
Prefix, First Name, Last Name, Company Name, Department, Job Title, Account Type,
Primary Address, City, State, Zip, Account Number, VIP Number, Office Phone, Home Phone,
Cellular Phone, Fax Number, Email Addresses (semicolon-separated → primary + Email 2),
Referral Source, Account Priority (VIP→High / NP→Medium / Low→Low),
Account Status (Active / Unknown), Account Terms, Username, Internal/Private Notes,
Preferences/Trip Notes, Notes for Drivers, Country, Alias