Feature Request: Adding Oauth support for the reddit ripper

[Gamerick]

In it's current state the Reddit ripper uses a very basic authentication free variant of the reddit api. To be precise, it appends '.json' to the url to rip and goes from there. While this allows for the majority of the site's contents to be ripped, there are a few instances where this fails to work. For example quarantined subreddits #1245, and the results from a search #38 (comment)_.

We can solve these issues by implementing Oauth authentication which would require users to login via ripme if they needed these extra features but would allow for far more powerful interaction with the site.

[Gamerick]

N.B. Currently looking in to this myself when I have free time

[xarantolus]

Another option could be implementing cookie support (like e.g. wget or youtube-dl), as mentioned in #192