Download by Episode or by Season

While cloning this repository, I noticed that a person could download the latest episode or download all episodes from all seasons. I didn't find an option to download a particular episode, nor did I see an option to download by season. So I figured, why not? I read through the code already written and added more features. Now a person can download a episode they missed or favored, as well as seasons. 

TODO: Add Season 13 and fix the 502 gateway error when attempting to download seasons 1, 2 and 3 after using the --no-check-certificate option (otherwise, wget won't be able to download due to being incapable of verifying certificate).