Readme update / CLI Help Text

[gauntface]

Just tried playing around with the CLI but with no operation being used this is the output:

$ admiral
(node:5521) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'dependencies' of null
(node:5521) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[jaridmargolin]

Ahhh interesting. admiral standalone should be enough to run the tests.

I believe this is coming from a downstream lib while trying to "load plugins". I should catch it and give clearer context as to what is happening. Does your project not contain a package.json?

[jaridmargolin]

May actually be interested in submitting an issue to the underlying lib to see why it relies on package.json rather than reading the node_modules directory. Perhaps just speed to avoid all of the I/O?

[jaridmargolin]

Opened discussion over @ jonschlinkert/load-plugins#14 regarding what the behavior should be when a package.json file does not exist in the repo.

Also created an issue over @ admiraljs/pawn#4 to make sure all errors are correctly output.

Thanks for logging and apologies for the confusion.