Merge pull request #54 from madebylotus/feature/update-readme-with-info-on-sidekiq

Adds mention of using RequestStore with Sidekiq

Author: steveklabnik

README.md

@@ -27,7 +27,7 @@ our controller:
 def index
   Thread.current[:counter] ||= 0
   Thread.current[:counter] += 1
-  
+
   render :text => Thread.current[:counter]
 end
 ```
@@ -97,6 +97,11 @@ def app
 end
 ```
 
+## Using with Sidekiq
+This gem uses a Rack middleware to clear the store object after every request, but that doesn't translate well to background processing with [Sidekiq](https://github.com/mperham/sidekiq).
+
+A companion library, [request_store-sidekiq](https://rubygems.org/gems/request_store-sidekiq) creates a Sidekiq middleware that will ensure the store is cleared after each job is processed, for security and consistency with how this is done in Rack.
+
 ## Semantic Versioning
 
 This project conforms to [semver](http://semver.org/). As a result of this