Improved CLI Experience

[jmariondev]

I've mostly just made up the CLI interface as I went along. Once it actually exists in a usable form, I think I should restructure it.

Subcommands

The names for these subcommands are kind of all over the place. I'd like to choose a more unified approach so it would be easier for a user to guess what the command they need is called without looking at docs. Maybe we can support aliases? I'm not sure if I like that idea.

Instances

• newinstance
• delinstance
• listinstances
• modifyinstance

Packages

• pkginstall
• pkgremove

Argument Structuring

Some required parameters are accepted as flags right now (for example, newinstance takes the instance name as -n). These required parameters are probably better accepted as positional arguments instead.