--starred-gists will never work for the specified user

[whwright]

With #87 and #92 I realized that there is no API to get the starred gists of another user. This means the --starred-gists will never work for the specified user, only the logged in user.

I'm curious what you think the solution here should be. I'm thinking:

1. Document this, maybe print a warning if you use --starred-gists
2. Remove the feature

[josegonzalez]

Probably renaming the feature would be smart, to indicate what it does better.

[Iamrodos]

This is very old but probably serves as documentation for troubleshooting in the absence of a fix. Be nice to resolve.

@josegonzalez which would you prefer?

1. Add runtime warning when using --starred-gists and specified user != authenticated user (my preference)
2. rename --starred-gists to --my-starred-gists (breaking change)
3. Document in README

Happy to PR.

[josegonzalez]

1 is fine.