README.md in apartment-0.21.1 vs README.md in apartment-0.22.0

@@ -92,10 +92,22 @@
     config.middleware.use 'Apartment::Elevators::Domain'
   end
 end
 ```
 
+**Switch on full host using a hash**
+To switch based on full host with a hash to find corresponding database name use the following:
+
+```ruby
+# application.rb
+module My Application
+  class Application < Rails::Application
+    config.middleware.use 'Apartment::Elevators::HostHash', {'example.com' => 'example_database'}
+  end
+end
+```
+
 **Custom Elevator**
 A Generic Elevator exists that allows you to pass a `Proc` (or anything that responds to `call`) to the middleware. This Object will be passed in an `ActionDispatch::Request` object when called for you to do your magic. Apartment will use the return value of this proc to switch to the appropriate database.  Use like so:
 
 ```ruby
 # application.rb
@@ -279,17 +291,19 @@
 
 ```ruby
 config.excluded_models = ["Delayed::Job"]
 ```
 
-## Development
+## Contributing
 
 * In both `spec/dummy/config` and `spec/config`, you will see `database.yml.sample` files
   * Copy them into the same directory but with the name `database.yml`
   * Edit them to fit your own settings
 * Rake tasks (see the Rakefile) will help you setup your dbs necessary to run tests
 * Please issue pull requests to the `development` branch.  All development happens here, master is used for releases
 * Ensure that your code is accompanied with tests.  No code will be merged without tests
+
+* If you're looking to help, check out the TODO file for some upcoming changes I'd like to implement in Apartment.
 
 ## License
 
 Apartment is released under the [MIT License](http://www.opensource.org/licenses/MIT).