Better tests, solutions and less ambiguities.
More Long

+ allSongs: Seq[Long]
Mover el resto de los números a Solutions
Merge pull request #5 from fedesilva/more-in-test
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/test/scala/DuplicatesTest.scala
	src/test/scala/util/Solutions.scala