added redgifs support to reddit ripper

[mn914]

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
• [X] a style change/fix
• [ ] a new feature

Description

I'm not sure what category this would fall in but my change adds support to redgifs links when ripping from a reddit profile.

i.e. when ripping a reddit profile, it will pick up redgifs links.

Testing

Required verification:

• [X] 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.
  • [X] Downloads all relevant content.
  • [X] Downloads content from multiple pages (as necessary or appropriate).
  • [X] Saves content at reasonable file names (e.g. page titles or content IDs) to help easily browse downloaded content.
• [X] 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.