allow listing of dir above size limit

BFF now allows listing of dir above size limit, shows error info if added switch -debug.

• list directories also which have total size above limit, even if individual file escape the check

bff -dir -path ~/Downloads -minsize 1500

• if listing is erroneous, get to see more info using -debug switch as

bff -dir -path ~/Downloads -minsize 1500 -debug