fixed project title in README.md
fixed project title in README.md

ubuntu/snappy-playpen,elopio/snappy-playpen,Zap123/snappy-playpen,ubuntu/snappy-playpen,ubuntu/snappy-playpen,jamestait/snappy-playpen,elopio/snappy-playpen,elopio/snappy-playpen,jamestait/snappy-playpen,jamestait/snappy-playpen,elopio/snappy-playpen,jamestait/snappy-playpen,Zap123/snappy-playpen,ubuntu/snappy-playpen