change Monacoin insight server.
Fix many issues.
update socket.io
change insight server for BTC.
insight server address changed. (http -> https)
add qrcode
Merge pull request #3 from you21979/gh-pages

ありがとうございます！
Show QR code when hovering address.
change QR code style for wallet dashboard.
Merge branch "gh-pages" into gh-pages-foomin10