Added mechanism to select chapters in case of duplicates.
Default behavior is to download higher sorted release (since remakes usually are sorted higher). Behavior can be modified by using two parameters: --interactive and --prefer-group. --interactive doesn't take an argument and will ask user input for each conflict. --interactive will still use the Batoto URL as an argument if provided despite the name. --prefer-group takes a single string as an argument and will pick release with the group name. If the string doesn't match, default behavior is used. If both parameters are provided, --interactive will override --prefer-group.