add em adapter docs

README.md

@@ -17,7 +17,7 @@ Faraday supports these adapters out of the box:
 * [Net::HTTP::Persistent][persistent]
 * [Excon][excon]
 * [Patron][patron]
-* [EventMachine][eventmachine]
+* [EM-Synchrony][em-synchrony]
 * [HTTPClient][httpclient]
 
 Adapters are slowly being moved into their own gems, or bundled with HTTP clients.
@@ -361,7 +361,7 @@ See [LICENSE][] for details.
 [travis]:       https://travis-ci.org/lostisland/faraday
 [excon]:        ./docs/adapters/excon.md
 [patron]:       ./docs/adapters/patron.md
-[eventmachine]: https://github.com/igrigorik/em-http-request#readme
+[em-synchrony]: ./docs/adapters/em-synchrony.md
 [httpclient]:   ./docs/adapters/httpclient.md
 [typhoeus]:     https://github.com/typhoeus/typhoeus/blob/master/lib/typhoeus/adapters/faraday.rb
 [jruby]:        http://jruby.org/

docs/adapters/em-http.md

@@ -0,0 +1,21 @@
+# EM-HTTP Adapter
+
+This Adapter uses the [em-http-request][rdoc] gem to make HTTP requests.
+
+```ruby
+conn = Faraday.new(...) do |f|
+  # no custom options available
+  f.adapter :em_http
+end
+```
+
+## Links
+
+* [Gem RDoc][rdoc]
+* [Gem source][src]
+* [Adapter RDoc][adapter_rdoc]
+* [EM-HTTP Adapter](./em-http.md)
+
+[rdoc]: https://www.rubydoc.info/gems/em-http-request
+[src]: https://github.com/igrigorik/em-http-request#readme
+[adapter_rdoc]: https://www.rubydoc.info/gems/faraday/Faraday/Adapter/EMHttp

docs/adapters/em-synchrony.md

@@ -0,0 +1,21 @@
+# EM-Synchrony Adapter
+
+This Adapter uses the [em-synchrony][rdoc] gem to make HTTP requests.
+
+```ruby
+conn = Faraday.new(...) do |f|
+  # no custom options available
+  f.adapter :em_synchrony
+end
+```
+
+## Links
+
+* [Gem RDoc][rdoc]
+* [Gem source][src]
+* [Adapter RDoc][adapter_rdoc]
+* [EM-HTTP Adapter](./em-http.md)
+
+[rdoc]: https://www.rubydoc.info/gems/em-synchrony
+[src]: https://github.com/igrigorik/em-synchrony
+[adapter_rdoc]: https://www.rubydoc.info/gems/faraday/Faraday/Adapter/EMSynchrony