easy Moo style way to make command organized CLI apps

 MooX::Cmd eases the writing of command line utilities,
 accepting commands and subcommands and so on.
 These commands can form a tree,
 which is mirrored in the package structure.
 On invocation each command along the path through the tree
 (starting from the toplevel command
 through to the most specific one)
 is instantiated.