Include more information in --help
Include more information in --help

`--no-deps` filled in with a little more information. Explain that
`--fix` implies `--no-deps`.
Explain that `--no-deps` is used with `cargo clippy --`, including
one example.

aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust