Provided support for customizing number of days of data to be synced for manual NBI data transfer as per Bruno's request:

Hi Supreet,

Seems nice. thanks.

- Can you please add a parameter to specify how many days to sync. VZW asked that in some case they want to sync more than 3 days.
  Max would be 2 weeks.

- Have you tested when these days span over different months, e.g. sync from  feb 26 to march 2nd ?

thanks,
br