The quick-error 1.0.0

[tailhook]

I think we are ready to release quick-error 1.0.0. The crate is stable enough. There are few issues on github but they are for features, not bugs.

There are already 20 crates that depend on quick-error, so I believe breaking them is a bad idea anyway.

@colin-kiegel, what do you think?

[colin-kiegel]

Ok. Yes, that makes sense to me. :-)