Implement News/Broadcaster function

[Grafe]

/news - Displays news
/news add time - Adds News for time
/broadcaster add - Adds new broadcast

[TTTheKing]

Implemented Broadcaster:

Message Types:
-Broadcast:
--An unlimited message which stays until it gets cleared from the config file.
-News:
--An message with limited time period. The TagColor swichtches over the time from "important" to "less important"
--until it gets cleared. Before it gets cleared it will be send once again to every logged in player.
-Date(Event):
--An message with limited time period heading towards a specific event/timestamp. The TagColor swichtches over
--the time from "less important" to "important" and the date will be shown in the tag until it gets cleared. Before it
--gets cleared it will be send once again to every logged in player.

Every message will be send to a player after some minutes, the minutes depend on the amount, the player recieved the message before. Like this, a player will recieve messages he allready know less offten than new ones.