Adds %map% and %player% variables into the broadcast

[QuiCM]

Much like MotD, replaces "%map%" with the world name or TShock server nickname, and "%players%" with a list of currently online players.

[Scavenger3]

Just wondering, why add if (Line.Contains("%map%") || Line.Contains("%players%"))? You check that in parseLine anyway.

Also, why iterate through each word? instead of just Line.Replace("%map%", worldName);. Is it so the variable has to be it's own word? That kinda defeats the point of using obscure symbols to reference a variable. If someone misses a space, it will just show e.g. Map name:%map%.

Thanks for the pull request :)

[QuiCM]

I added
if (Line.Contains("%map%") || Line.Contains("%players%"))
Because that way it only checks lines that contains those, rather checking every line.
I iterated through every word because previous testing with Line.Replace("string", "newstring") failed. Although you made me realise there was a MUCH simpler way of doing it. Do you want me to bother with Line.Contains() in the broadcast method? Or would you prefer me to remove it from there and just leave it in parseLine?

[QuiCM]

This PR now supports Api Version 1,15