Allow line finding by line number as well as line name
Changes to database access, utilising with fieldnames now constants
Removed unused and unnecessary routine
Added a debugging "cursor to string" routine
Temporarily remove Dapol cleaning wagon check
Improved cursor display for new line creation mode
A new line record can now be added to the database
DJW-improved method for calculating the inter-line spacing
Omitted from earlier commit (Fieldname constants)
Changes to databases caused by testing Rail program