Added prompt if alternate file does not exist, asking if you want to create it

[mtscout6]

trafficstars

This does not have to be the final acceptable solution for #5 but this is what I plan to use until something is figured out. Instead of blindly creating a file, and instead of saying absolutely not I'm leaving it in the users hands to decide whether or not to create the missing alternate file. I'm open to suggestions here!

[maksimr]

+1

[rainerborene]

+1

[panozzaj]

I would also find this useful. Thanks for submitting!