added demos
added demos

timqian/synaptic,lukecleland/synaptic,mleanos/synaptic,code0100fun/synaptic,Qard/synaptic,kessler/synaptic,educoding/synaptic,gn6me/synaptic,anubisthejackle/synaptic,andrewfry/synaptic,mcanthony/synaptic,jzjzjzj/synaptic