Attempt to download unmuted segments where possible. #63
Description
Currently, VodBot takes each segment from Twitch as it exists without question. When VOD mutes happen, the muted segments get a -muted infix in the filename. When this happens, VodBot should check that the unmuted segment still exists in Twitch's CDN. If it does, it should download it and update the m3u8 playlist so that FFmpeg concats the segment correctly.
VodBot should also let the user know of any segments that were found unmuted, as well as if any segments were muted.