Put link or guide how to get GCM_API_KEY

[zishon89us]

node-cheat/push_notification/push_notification.js

Line 11 in ac4e691

var sender = new gcm.Sender("GCM_API_KEY");

[zishon89us]

@abdulmoizeng any update?

[abdulmoizeng]

@zishon89us will do it as soon as i get some space from other work

[zishon89us]

@abdulmoizeng appreciate it, thanks!

[abdulmoizeng]

@zishon89us #7