Added the class for process and index the stage files, now the ChaosDataService
can run in two different mode("Query answer" and "stage indexer").
abstraction of the stage file into two separate class (writeable and readable).
Merge pull request #40 in CHSBNDL/chaosframework from feature_vfs_worker to development

* commit '9c116a466ffac400f439666c6caebd9122d79d16':
  Added the class for process and index the stage files, now the ChaosDataService can run in two different mode("Query answer" and "stage indexer"). abstraction of the stage file into two separate class (writeable and readable).