buffed erosion, improved Department selection

erosion also gives less wave destruction for having rivers.
Department now makes a list of available items to choose from once;
rather than continually picking a random item and checking if it's
available until one is found or it gives up.
buffed Not Lucky reward

now counts boosts, and gives more castles for higher levels of tools
export has been riverified

using P S C as delimeters instead of | ; , removes escaping so it's a
lot smaller
had to replace some literal uses of ',' in import where it should have
had c.