Add docs section explaining how to build an airbyte connector from a …

…singer tap (#1087)

docs/contributing-to-airbyte/building-new-connector/README.md

@@ -33,6 +33,13 @@ Follow the instructions generated in the `CHECKLIST.md` file to bootstrap the co
 
 The generated `README.md` will also contain instructions on how to iterate.
 
+### Creating a Connector from a Singer Tap
+[Singer.io](http://singer.io/) is an established open source framework with a vibrant community and many available connectors (known as taps & targets). Airbyte makes it simple & easy to build an Airbyte connector from a Singer tap. The basic idea is to wrap the Singer tap in a shim Python package which makes the Singer tap compatible with the Airbyte protocols, then publishing that in a Docker image consumable by Airbyte. 
+
+To create an Airbyte connector from a Singer tap, run the connector generator as described above and choose the Singer generator. The generated package will contain the details about exactly what needs to be done. 
+
+See the [Github Connector](https://github.com/airbytehq/airbyte/tree/master/airbyte-integrations/connectors/source-github-singer) for an example of an Airbyte Connector implemented on top of a Singer tap. 
+
 ## Updating a connector
 
 Once you've finished iterating on the changes to a connector as specified in its `README.md`, follow these instructions to tell Airbyte to use the latest version of your connector.