Tidy up the Ruby codes.
Various amendments and refactorings of the Scala codes.
Amend the Scala ignore file.
Update versions of Scala and Akka used.
A few tidying up things.
Remove the multiple executions since there was no difference between them.
Add a version using nested streams.
Remove the experiments having shown they do not improve performance.
Add the App using a map version.
Update for latest Rust changes.
Add the new Kotlin versions.
Add per file comment with copyright line.
Move the JDK7 to a JDK7 specific package.
Make the code actually work for X10 2.4.2.
Given the code a better name.
Update the Git ignore list.
Correct various names and copyright dates.