fix bug in chronological sorting for search & list output
improve console output for delete
add 'regions' command to list only regions (without availability zones)
listkeys and describe do proper argument error checking
remove extra console output
allow search by short name for others vms.  if a search for a single VM yields more than one record, fail. (for saftey, this is used for vm deletion)
one of these things is not like the other - help formatting
update changelog for 0.6.1