New Features & Enhancements
* Added [rjdl documentation](https://rjdl.readthedocs.io/en/latest/).
* Added **search** method that searches given string in RadioJavan database and return a dictionary of founded results.
* Added **downloader** method that downloads given direct download link at the given path.
* Enhanced whole code style.
* Enhanced application CLI (Command-Line Interface) to a nicer and more efficient one based on python bulit-in library argparse. (Suggested by AmirHosein-Gharaati in 4)
* Enhanced and replaced old media methods with new classes and methods that let you make objects out of your Music, Video, Album, Podcast and Playlist URLs, and have access to all available data and information provided by RadioJavan for them.
Bug Fixes
* Fixed some typos in README.
* Fixed error when try to download albums and playlists with tracks that contain special characters like <.> in their title.