upgrade to last akka version

upgrade akka version to 2.3.4
Merge pull request #3169 from hepin1989/patch-2

upgrade to last akka version
Changed Play Intro / Feature Tour Templates

Signed-off-by: Markus Jura <markus.jura@gmail.com>
Allow the logging configuration file to be called logback.xml
Merge pull request #3175 from benmccann/logback-xml-2.3.x

Allow the logging configuration file to be called logback.xml
Fixed JNotify load detection

This ensures that dev mode works on FreeBSD.
Add support for JDK7 watch service

* Automatically uses JDK7 watch service if available and not OSX
  (because on OSX it does polling)
* Otherwise attempts to use JNotify if Windows, OSX or Linux
* Falls back to SBT watch service if all others fail
* Can be configured by end user
* Made the dev-mode tests test all 3 watch services (if available)
* Made the dev-mode tests a little more robust and faster by spinning
  for up to 10 seconds to wait for conditions to be true.
Merge pull request #2950 from markusjura/2.3.x

Changed Play Intro / Feature Tour Templates
Fixed scaladoc for WebSocket.tryAcceptWithActor
Merge pull request #3179 from FabienPennequin/scaladoc-websocket

Fix scaladoc for WebSocket.tryAcceptWithActor
Added documentation about the SBT assembly plugin
Revamped documentation due to #2915 and #2898
Ensured WatchService watches directory recursively

* Also fixed MatchError on FreeBSD
New intellij documentation
Merge pull request #3193 from benmccann/idea-23x

New intellij documentation
Upgrade SBT native packager to 0.7.2 to get recent bug fixes
Merge pull request #3194 from benmccann/sbt-native-packager-072-23x

Upgrade SBT native packager to 0.7.2 to get recent bug fixes
Support for advanced Netty options

Fixes #2747
Get the latest bug fixes from sbt-native-packager with 0.7.3
Merge pull request #3200 from benmccann/package-23x-073

Get the latest bug fixes from sbt-native-packager with 0.7.3