Update CONTRIBUTING - add Forum link
Update CONTRIBUTING - add Forum link

loomchild/jenca-puffin,loomchild/puffin,puffinrocks/puffin,loomchild/puffin,loomchild/puffin,loomchild/puffin,loomchild/jenca-puffin,puffinrocks/puffin,loomchild/puffin