Add SD `web-dl` support

Fixes detection of things like `Project.Runway.All.Stars.S03E02.Bitten.By.The.Fashion.Bug.WEB-DL.x264-RKSTR`
`Cutthroat.Kitchen.S01E03.Tac-o.the.Town.WEB-DL.x264-JIVE`

  > This will pick up mSD's 480 web-dl re-encodes now. Added `480p` to ignore_words to stop those for new installs, people can modify if they really want those.