(Reuters) – Former Beatle Paul McCartney has recorded a new version of his 1971 song "Heart Of The Country," and directed fans to YouTube where the song accompanies an animated clip featuring his late wife Linda. "I did a new mega simple version of 'Heart Of The Country' for the Linda animation on YouTube," McCartney posted on Twitter on Wednesday. The 40-second clip was posted in the United Kingdom on January 11 by "Linda McCartney." "Sounds cool to me!" he said in Wednesday's tweet. …