Add Ripper for nsfwalbum.com

[Issung]

Category

This change is exactly one of the following (please change [ ] to [x]) to indicate which:

• a bug fix (Fix #...)
• a new Ripper
• a refactoring
• a style change/fix
• a new feature

Description

I've gone ahead and added a ripper for nsfwalbum.com.
They host their images on many different image hosting sites so you must replace part of the image urls to get the full image instead of the thumbnails.
There may be more hosts that I did not find, they can be added in later very easily.

Testing

Required verification:

• I've verified that there are no regressions in mvn test (there are no new failures or errors).
• I've verified that this change works as intended.
  • Downloads all relevant content.
  • Downloads content from multiple pages (as necessary or appropriate).
  • Saves content at reasonable file names (e.g. page titles or content IDs) to help easily browse downloaded content.
• I've verified that this change did not break existing functionality (especially in the Ripper I modified).

Optional but recommended:

• I've added a unit test to cover my change.

NOTES:
mvn test failed, i think it may because of how my maven is setup, it doesnt reference any files of ripme in the stacktrace, i can post the error if that is helpful.
I don't have any experience on how to do unit testing, I am eager to learn if someone wants to help and give me a quick run down.

[Issung]

It says the checks were not successful, this is my first pull request, can someone help me out here? From what I can gather the test failures aren't related to my contribution.