UniqueId bugs:
  - resolution of already created ids fails with NoSuchElementException
  - resolution of new ids fails silently
  Future.onSuccess calls was substituted by Future.map
UniqueId.resolveByName refactoring
Merge remote-tracking branch 'upstream/master' into UniqueId_fix2
rethrow bug fixed
Merge pull request #40 from VasilyKolpakov/rethrow_bug

rethrow bug fixed
Merge pull request #38 from VasilyKolpakov/UniqueId_fix2

Unique id fix2
bugs:
 - ChunkedResults returns only the first chunk
 - wrong config paths in HttpQueryServer
 - unused config path in KafkaPointsConsumerConfig
 changes:
 - informative error message on wrong sink and source types
 - some configs moved to defaults
simple health-checking handle
kafka consumer test fixed
Merge pull request #41 from VasilyKolpakov/health-check-server

Health check server