Describe what this code base is, in the Read Me and repository description

[bignose-debian]

The Read Me document currently does not say what this code base is.

A link to the Ethash algorithm page, does not say what this code base is. Is it an implemnetation? In what languages? There is a lot of C, C++ JavaScript, Python, Go language code; is it a library implementation for all of those? The Read Me document does not say.

The repository's description and the Read Me can say a simple sentence, like “JSEthash is an implementation of the Ethash algorithm for JavaScript” (or whatever is actually true for this code base).