parallel.sc should bu updated

[byejude]

source in // src/main/scala/progscala2/collections/parallel.sc
should add 'import scala.collection.parallel.CollectionConverters._',see it in scala-parallel-collections,
and when i import this in parallel.sc and run it, it says
'error: value par is not a member of scala.collection.immutable.Range.Inclusive
did you mean map, max, or span?
'
and i change it to *.scala and add main function,it runs sucessful, and i dont know why

[byejude]

bu -> be

[deanwampler]

Closing this now as the code has been completely refactored.