Upgraded: dependencies. Added printit
Improved: code style, logging (printit).
Fixed: program.confirm and program.password doesn't exist anymore in commander. Used inquirer to replace them. Close #39
Improved: code style and flow control
Linted
Fixed: typo
Changed: log prefix
Renamed: dev:* command to vm:*
Changed: vm:destroy command order
Fixed: typos
Fixed:  command was not working anymore
Merge pull request #40 from jsilvestre/master

Bug fix and code improvements