www/rubygem-faraday-rack: Add rubygem-faraday-rack 1.0.0

Faraday Rack adapter is a Faraday adapter for a Rack app. Faraday is an HTTP
client library that provides a common interface over many adapters. Every
adapter is defined into its own gem. This gem defines the adapter fora Rack app.

WWW: https://github.com/lostisland/faraday-rack