README.md in oembed_proxy-0.2.0 vs README.md in oembed_proxy-0.2.1

@@ -93,9 +93,16 @@
 
 ### Implementing your own providers
 
 You are able to easily implement additional providers by creating an object which implements the `#handles_url?(url)` and `#get_data(url, other_params)` methods. Take a look at the existing provider classes for examples.
 
+### Note on the NPR 
+
+The NPR  embed is what we call a fauxembed.  NPR does not implement the oembed
+specification so we fake it by wrapping the embed url in a side-chain
+element. Then you must load the NPR Sidechain library on your site.  See
+[Sidechain](https://github.com/nprapps/sidechain).
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `bin/rspec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment. Before sending a pull request, you will want to run `bin/rubocop` to lint your work.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).