JSON support with example workflow, bug fixes & file reorganizing

* added JSON support with "request_json()"
* library makes use of third party helpers for JSON & Notifications
* fixed a nasty bug with data/cache folder creation
* added a new workflow for live searching the latest tweets on Twitter
(thus showing the JSON support in action)
* updated documentation with new methods & info
* renamed files & reorganized them to avoid confusion and mixing with
other files