Changes for releasing with Scala 2.12.0-RC1

change version to 2.4-ARTERY-M4

Version 2.4.10

2.12.0-M4 release

Version 2.4.9

Version 2.4.9-RC2

Version 2.4.9-RC1

Version 2.4.8

2.4-ARTERY-M3 version

version 2.4-ARTERY-M2