Two decades after Nelly put St. Louis’ hip-hop scene on the map, his breakthrough debut album has been digitally expanded by UMe. A new 20th anniversary expansion of Nelly’s Country Grammar is now available to stream and download, featuring the original album alongside four bonus tracks available digitally for the first time, including the soundtrack rarity “Icey”; “Come Over,” a collaboration with Funkmaster Flex; and instrumental versions of the album’s biggest hits, “Country Grammar” and “Ride Wit Me.” It was those two tunes that helped Country Grammar propel Nelly (born Cornell Hayes)…