Bumping version number to 3.1
Bumping version number to 3.1

laurentVeliscek/AudioKit,dclelland/AudioKit,dclelland/AudioKit,laurentVeliscek/AudioKit,roecrew/AudioKit,narner/AudioKit,narner/AudioKit,narner/AudioKit,laurentVeliscek/AudioKit,dclelland/AudioKit,laurentVeliscek/AudioKit,narner/AudioKit,dclelland/AudioKit,roecrew/AudioKit,roecrew/AudioKit,roecrew/AudioKit