* commit 'f7b51f60': (47 commits)
  refactor
  using epool for linux data server
  mofified worker example
  release connection when no data found, update tests, correct file permissions
  update nomad config
  fix test
  fix mem leaks
  add statistics for data server
  refactoring statistics class
  fix windows tests
  fix windows tests
  fix windows tests
  refactoring, more intergation tests
  fix windows tests
  fix windows tests
  add integration test for memory buffer
  finished client
  bugfix
  started working at client for memory buffer
  server part of mamory cache
  ...