Crate-level documentation and README should mention that it is about error handling

[vi]

Easily assign underlying errors into domain-specific errors while adding context

This phrase is only in Github repository description. It is not obvious what is this library about from looking at README or crate-level doc.

Something like the phrase from Github repository description should be copied to the opt of the doc.

[shepmaster]

Keeping those three things in sync is always a pain, thanks for helping me to remember!

that it is about error handling

So, this is a bit odd, but I've wondered if this crate really is about error handling. We don't really handle the error, just enhance it to provide more information. Handling an error would be a match or Result::or_else, etc.

Since I have you here... do you have any ideas for what this would be properly called?

[vi]

I assumed "error handling" == "error management" (in library context); crates like quick-error, error-chain, failure.