add support for likes url

[realies]

potentially fixes #25

[DJoepie]

I haven't ran the code, but it looks fine to me. I like the pagination to get all the likes.

[realies]

unfortunately it does not work, haven't fully figured it out yet

[DJoepie]

What specifically doesn't work? I have a working version to download likes somewhere, but it's written years ago so it's kind of ugly, but maybe we can combine them to make it work.

[realies]

the user class does not exist and I'm not even sure it's needed, feel free to share your implementation, even though my python is a little rusty

[DJoepie]

This is my most recent version (I think) I haven't tracked my changes that well over the years (I rarely made changes)

https://github.com/DJoepie/sc_dl