Refactored MangaGet::MangaHereScraper::get_chapter_list into get_chapters_hash, that returns a hash of all chapter urls with the number as the key. When a new scraper is initialized @chapters is set to the hash and then all chapter lookups are done through @chapters. By using a hash, mget can maneuver around the pesky problem of mini-chapters link hunter_x_hunter 340.5.