Fixed screenshot in README
Fixed screenshot in README

The old link was dead since mattercontrol.com was taken down. I took a new screenshot for MatterControl 2.0.
larsbrubaker/MatterControl,jlewin/MatterControl,jlewin/MatterControl,jlewin/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,unlimitedbacon/MatterControl,mmoening/MatterControl,mmoening/MatterControl,unlimitedbacon/MatterControl,jlewin/MatterControl,larsbrubaker/MatterControl,mmoening/MatterControl