Read streamelements subscribe messages from chat to activate mega tnt

[vycdev]

This would require a new option in the configuration file.

It should look something like this:

"subscribeChatMessage": {
    "accountId": "the id of the bot sending the subscribe alert chat message",
    "messageTemplate": "Thanks for subscribing {0}"
} 

Where {0} is the name of the new subscriber.

The game would check the already existing stream of chat messages for messages sent by a user with the specified account id and the matching message template, and if it finds any, it will spawn mega tnt in the game.

This should be a good workaround to YouTube's limited API.