TRENTON, N.J. - New Jersey Gov. Phil Murphy has signed into law legislation to set up a recreational marijuana marketplace, decriminalize cannabis and loosen penalties for underage possession of the drug and alcohol.The move comes more than three months since voters overwhelmingly approved a ballot question to legalize adult use of the drug.The Democrat-led Assembly and Senate passed the last-minute measure Monday to ease penalties on underage possession of both alcohol and marijuana as a way to secure Democratic Gov.