Add a command-line interface (CLI)

[chuckwondo]

For convenience, particularly when using the MAAP UI is cumbersome for repetitive tasks, we should provide a CLI for users.

The CLI should likely support the following commands:

• maap algo list
• maap algo register YAML_FILE
• maap algo describe ID
• maap algo delete ID
• maap job queues
• maap job list USERNAME
• maap job submit --algo ID --tag TAG --queue QUEUE --username USERNAME [--inputs INPUTS] [--data JSON_FILE]
• maap job describe ID
• maap job await ID
• maap job cancel ID