Add `free` to list description

There has been some recent interest in adding paid services to this list, so adding `free` in the project's description to clarify the mission of the project.

Add `free` to list description
There has been some recent interest in adding paid services to this list, so adding `free` in the project's description to clarify the mission of the project.
7d14ce57 · Dave Machado · GitHub · a57131ea · 7d14ce57
Commit 7d14ce57 authored Mar 28, 2017 by Dave Machado Committed by GitHub Mar 28, 2017
--- a/README.md
+++ b/README.md
 # Public APIs [![Build Status](https://api.travis-ci.org/toddmotto/public-apis.svg)](https://travis-ci.org/toddmotto/public-apis)

-A collective list of JSON APIs for use in web development.
+A collective list of free JSON APIs for use in web development.

 For information on contributing to this project, please see the [contributing guide](CONTRIBUTING.md).