Documented JVM settings in forked Java test processes.

This update is in response to this thread: https://groups.google.com/forum/#!msg/play-framework/SqXk7EQgMwk/DxJaWMVlzcoJ
Changed Typesafe copyright from 2012 to 2013
Merge pull request #782 from seantbrady/play21-documentation

Documented JVM settings in forked Java test processes.
Merge pull request #783 from xaoc3dgraph/changed-copyright

Changed Typesafe copyright from 2012 to 2013