Kompose help needs improvment

[janetkuo]

Current kompose help gives me:

$ ./kompose -h 
NAME:
   kompose - Command line interface for Skippbox.

USAGE:
   kompose [global options] command [command options] [arguments...]

VERSION:
   0.0.1-beta (HEAD)

AUTHOR(S):
   Skippbox Compose Contributors <https://github.com/skippbox/kompose> 

COMMANDS:
    convert Convert docker-compose.yml to Kubernetes objects
    up      Submit rc, svc objects to kubernetes API endpoint
    ps      Get active data in the kubernetes cluster
    delete  Remove instantiated services/rc from kubernetes
    scale   Globally scale instantiated replication controllers

GLOBAL OPTIONS:
   --verbose, --debug           
   --file, -f "docker-compose.yml"  Specify an alternate compose file (default: docker-compose.yml) [$COMPOSE_FILE]
   --help, -h               show help
   --generate-bash-completion       
   --version, -v            print the version

A few things need improvement:

1. "Command line interface for Skippbox" is vague to me as a description of kompose (users may ask: so what does this CLI do?).
2. up/ps/delete/scale didn't work for now, but still shows up in help
3. Global options aren't actually global. They only belong to kompose but not its subcommands (except for --help, -h, but it's not shown in subcommand help).