After years of operating in the shadows, people who make marijuana-infused foods, tinctures and oils for qualified medical patients may finally get their own state license. State lawmakers who oversee Maine’s medical marijuana program want to license and regulate the use of explosive chemicals or gases to extract concentrates from the cannabis plant. Full of cannabidiol, the part of the cannabis plant with healing and therapeutic properties, the extracted resin can be made into edible foods or oils, topical salves or wax that can be vaped.