Global object's location  to enable GZIP in Java

Reference to Global Java object for easy lookup.
log http wire

the http packets are logs when:
- the application is started with -Dhttp.netty.log.wire=true
- the org.jboss.netty.handler.logging.LoggingHandler logger
  is set to DEBUG
Jackson upgrade
Merge pull request #3665 from mkurz/jacksonUpgrade

Jackson upgrade
Merge pull request #3635 from arifchishti/master

Global object's location  to enable GZIP in Java
Merge pull request #3625 from yanns/logwire

log http wire
Replace tabs/spaces with only spaces
Remove unused files from sbt-plugin
Merge pull request #3667 from benmccann/unused-compilation-resources

Remove unused files from sbt-plugin
Remove PlayTestListener which doesn't seem to be used for anything and we think was created to allow running tests in the browser though that feature was never actually fully implemented
Merge pull request #3668 from benmccann/remove-testlistener

Remove PlayTestListener