Simple nick-name maker.
When a "WordPool" with multiple characters is passed to the nickname generator "NickNameMaker", it will generate a nickname using the characters set in the WordPool.
import com.github.tenslar.nicknamemacker._
val word_pool = new WordPool(Array("hello", "world"))
val generator = new NicknameMaker(word_pool)
println(generator.generateNickName(2))
// worldworld or hellohello or helloworld ...