By Reuters Staff 2 Min Read Dakar, April 16 (Reuters) - Congo Republic’s President Denis Sassou Nguesso pledged to reform and simplify business and tax laws to help boost economic growth as he was sworn in on Friday, prolonging his 38-year reign over the central African oil producer. Known as “emperor” by some of his African peers, 77-year-old Sassou was re-elected with more than 88% of the vote in a March 21 presidential election. He came to power in 1979, ruling until he lost Congo’s first multi-party elections in 1992 before returning to office in 1997 after a civil war. Sassou sai...