Does not have built-in usage help

[romanrm]

$ ./bdsync --help
./bdsync: unrecognized option '--help'

$ ./bdsync 
Bad number of arguments 0

Could you please implement brief usage instructions with a list of the possible command line options and what they do?

Thanks!

[rolffokkens]

Thanks for pointing this out, could you check if the fix is OK?

[romanrm]

Thanks!