SPRINGFIELD — Gov. Bruce Rauner signed into law Tuesday a bill that expands the state’s medical marijuana program by allowing patients to access prescribed cannabis in place of pharmaceutical opioid medications. Senate Bill 336 allows doctors to authorize use of medical marijuana for patients who would otherwise take an opioid prescription like Vicodin or OxyContin.The bill, also known as the Alternatives to Opioids Act, requires physicians to certify that the patient is or could have been prescribed an …