Remove jQuery and TrackerBlock mentions in the README

We no longer bundle the TrackerBlock JSON file and we no longer
use jQuery.

However, we do bundle PicoModal, so let's add it to the list.

README.md

@@ -42,16 +42,11 @@ At this point, any changes you make to the web front-end simply require reloadin
 The following software is bundled with the repository and doesn't need to be manually obtained.
 
 * [D3][]
-* [jQuery][]
-
-## Data Used
-
-Contained within the repository is a JSON file listing all public trackers on the internet. It came with the [TrackerBlock][] add-on.
+* [PicoModal][]
 
   [ASDK]: https://addons.mozilla.org/en-US/developers/builder
   [D3]: http://mbostock.github.com/d3/
-  [jQuery]: https://github.com/jquery/jquery
-  [TrackerBlock]: http://www.privacychoice.org/trackerblock/firefox
+  [PicoModal]: https://github.com/Nycto/PicoModal
   [Firefox 18]: http://www.mozilla.com/en-US/firefox/fx/
 
 ## LICENSE