Improve string formatting
Remove bitly_date_ranges_without_data() function because we won't be using it
Before enqueueing Bit.ly stories manually, check if maybe all of them are processed already
Add readonly variable $BOUNDARY to make it clear what does "1" mean
Change warning to a debugging message (because overwriting Bit.ly stats is going to be a normal part of the workflow from now on)
Add subroutines to remove Bit.ly data for story / controversy