fixed to use https (in README.md)
add sqlite file to ignore file
Merge pull request #4 from nise-nabe/fix-readme-https

fixed to use https (in README.md)
Merge pull request #3 from nise-nabe/rm-db

add sqlite file to ignore file
socket.ioのソースの取得方法を変更
デモ用のURLをREADMEに追記