A felony is a crime which: (1) Was a felony at common law; (2) Is or may be punishable by death; (3) Is or may be punishable by imprisonment in the State's prison; or (4) Is denominated as a felony by statute. Any other crime is a misdemeanor. (1891, c. 205, s. 1; Rev., s. 3291; C.S., s. 4171; 1967, c. 1251, s. 1.)