Migration to play 2.1-RC1. see #7 & #8

- Module version is now 0.5.0
- Module depends on sbt 0.12.1
- Declaring a fake route file & Controller as a workaround to make "publish-local" work
- Upgrading the sample app too
Informations for 0.5.0 in the README file
Better workaround to allow publish-local to work
New config parameter "dropOnShutdown"

 - if set to true, will delete index on application shutdown
 - should be used with care, probably only for implementing tests
First step on Scala helpers & sample app
Basic tests of the Plugin & Scala helpers
Loading mappings from Config in addition to annotations
Build module script
Refactoring & Tests of the Scala wrappers
Cleaning logs
Testing travis configuration
Test of the mapping configuration
Restoring IndexQuery to its original state

 - some changes were made when starting work on the scala helpers but are no more used
Small scala API refactoring
Some more comments in the Scala helpers
Elasticsearch version upgrade

 - Upgrading to elasticsearch 0.20.4
 - Upgrading module version to 0.5.1
Merge branch 'master' into scala
Scala helpers refactoring

 - Scala helpers are now in object com.github.cleverage.elasticsearch.ScalaHelpers
Add elasticsearch.config.resource properties for customize local node settings ( refs #9 )
Upgraded to play 2.1.0