[#53420683] Updates the broadcast messaging page of the knowledge base.


![allplayers com](https://f.cloud.github.com/assets/2251119/1655978/37c9f4e0-5b6b-11e3-8aca-c42faf7ab2ad.jpg)


![allplayers com 2](https://f.cloud.github.com/assets/2251119/1655976/37bb2cc6-5b6b-11e3-9ee4-e65a25b5d02c.jpg)


![allplayers com 3](https://f.cloud.github.com/assets/2251119/1655977/37c57794-5b6b-11e3-9a91-e1c76b2d1722.jpg)