Add freeboard to Monitoring

This is a great data viewer that's originally intended to easily display sensor data from IoT devices, but we have been using this in-house for a while to show disparate JSON data and it has been a joy to use. 

Check out the demos at http://freeboard.io/ and see for yourself!

README.md

@@ -319,6 +319,7 @@
 * [Cabot](http://cabotapp.com/) - Monitoring and alerts, similar to PagerDuty.
 * [check_mk](http://mathias-kettner.com/check_mk.html) - Collection of extensions for Nagios.
 * [Dash](https://github.com/afaqurk/linux-dash) - A low-overhead monitoring web dashboard for a GNU/Linux machine.
+* [freeboard](https://github.com/Freeboard/freeboard) - A damn-sexy front-end real-time dashboard. Transforms raw JSON into delicious UI. View component of MVC.
 * [Icinga](https://www.icinga.org/) - Fork of Nagios.
 * [LibreNMS](https://github.com/librenms/librenms/) - fork of Observium.
 * [Monit](http://mmonit.com/monit/#home) - Small Open Source utility for managing and monitoring Unix systems.