Merge pull request #40 in ASAPO/asapo from feature_datasets to develop

* commit 'd62dd441': (26 commits)
  filegen producer - multisource datasets
  fix leak
  filemon producer works with batch datasets
  fix test
  fix tests
  implemented retrieving data from given fileinfo
  windows tests
  windows tests
  python interface for datasets
  fix win test
  remove http test bad address
  win test
  win test
  implemented getlast, getbyid for datasets
  fix windows test
  added integration test for datasets
  broker ready
  datasets implemented in worker C++ api
  fix windows test
  fix windows test
  ...