Bug: Scraping Issues

There are numerous scraping issues, mostly relatively minor.

* Since the colon (`:`) is not legal as a filename in most file systems, things named `THIS GAME - SUBTITLE` should be scraped as `THIS GAME: SUBTITLE` if  `THIS GAME - SUBTITLE` doesn't return any results.
* In batch, sometimes the scraper stops grabbing box art - no error messages it just stops doing it.