Update <license> tag

Update repository URL

Only mark MP4 portal submissions as playable

Lift Newgrounds API interactions into separate library

Update roadmap section in README

Add support for the "Your Feed" page

Initial authentication support

Add support for series and collections

Be more defensive in `get_addon_video_info`

Refactoring

Initial search capability

Scrape additional video metadata

Fetch video metadata concurrently

Remove reference to embedded library

Lint

Fix typo in README

Add README

Add support for genres

Initial commit