Allow 'bectl list' to sort output by a given property name. The property name is passed in using a command-line
flag, '-c' for ascending order and '-C' for descending order. The properties allowed to sort by are:
name (the default output, even if '-c' or '-C' are not used)
The default output for 'bectl list' would now be in ascending alphabetical order.
To sort by creation time from earliest to latest, the command would be 'bectl list -c creation'