Added simple config for Akka.

Also bumped Play minor version.
Merge branch 'master' of github.com:guardian/frontend into akka-config
Merge branch 'master' of github.com:guardian/frontend into akka-config
Merge branch 'master' of github.com:guardian/frontend into akka-config
Set parralelism to 2.0 for article
Move Ivy cache dir for project.
Merge branch 'master' of github.com:guardian/frontend into akka-config
Merge branch 'master' of github.com:guardian/frontend into akka-config
Added some metrics around the connection pool for WS
Updated Akka conf of all projects
Merge branch 'master' of github.com:guardian/frontend into akka-config
No longer need all these dispatchers
Merge pull request #663 from guardian/akka-config

Updated to Play 2.1.1