Refactor all the web server to use a parser to analyse the query and select the right rest operation! => make code really more clear!
  - add parser
  - clean up old service : replace by listener called by the parser when it detects a correspondance between an uri and a rest service
  - little refactor of persistence service to push it to engine and anymore at the top level
Try to go on kepler... always need to really clean up all eclipse dependencies and only have pom (difficult since OSGi is nearest eclipse than maven...)
  - create a basic osgi container with only required dependences
  - clean up a bit manifest.mf