Merge pull request #1215 from huntc/com-typesafe-play

Rename GroupId to “com.typesafe.play”
flip parameter order

https://issues.scala-lang.org/browse/SI-6481
Merge pull request #1226 from xuwei-k/request/flip-param-SI-6481

flip parameter order
Update ProductionConfiguration.md
Update ProductionConfiguration.md
Remove the compiler warning associated with reporting that the wrong rt.jar is being compiled against - we trust the jdk team to produce compatible byte code. :-)
Removed some more compiler warnings around application handlers and tidied up some code.