Adding imports and main to first README example

[arashout]

Hey I'm a rust newbie and it took awhile to get the first example to work. So I thought I would the imports you need to get going

[jonhoo]

Hey! And welcome!

This repository uses cargo-readme, which causes README.md to be generated from the top-level crate documentation in src/lib.rs. This is so that any example code is also run as documentation tests, so I'll know if I accidentally break an example. In this particular case, I was taking advantage of hidden statements so that the user isn't distracted by all the boilerplate of extern crate (which will soon go away) and use statements. But, as you have just demonstrated, that hiding backfires! If you look at the raw example code in src/lib.rs, you'll see that the lines you added are in fact there:

https://github.com/jonhoo/fantoccini/blob/master/src/lib.rs#L30-L36

That's why the test indeed passes, even though it is seemingly missing some lines.

I think the right thing to do here would be to keep the extern crate and fn main() { lines hidden, but unhide the use statements in the first example. Hopefully that'll make it clearer to newcomers to the library what they need to do without introducing too much extra noise. The compiler will suggest the missing extern crate statements.

If you want to submit a PR that unhides the lines in src/lib.rs, I can re-run cargo readme. Or you can re-generate README.md yourself with cargo readme > README.md if you want and include it in the PR.

Thanks!

[arashout]

Oh! That's pretty cool, I did not realize that. Will create another PR doing it the right way