Update Readme: Add note re: support for the HTTP gem, sort in

alphabetical order - so that they are not easily missed

    Folks when reviewing will be able to quickly see what clients are
supported - ordered in alphabetically order.

README.md

@@ -24,16 +24,19 @@ Features
 Supported HTTP libraries
 ------------------------
 
-* Net::HTTP and libraries based on Net::HTTP (i.e RightHttpConnection, REST Client, HTTParty)
-* HTTPClient
-* Patron
-* EM-HTTP-Request
+* Async::HTTP::Client
 * Curb (currently only Curb::Easy)
-* Typhoeus (currently only Typhoeus::Hydra)
+* EM-HTTP-Request
 * Excon
-* HTTP Gem
+* HTTPClient
+* [HTTP Gem (also known as http.rb)](https://github.com/httprb/http)
 * Manticore
-* Async::HTTP::Client
+* Net::HTTP and other libraries based on Net::HTTP, e.g.:
+  * HTTParty
+  * REST Client
+  * RightHttpConnection
+* Patron
+* Typhoeus (currently only Typhoeus::Hydra)
 
 Supported Ruby Interpreters
 ---------------------------