Merge official Gaudi master into LHCb future branch
it includes merge requests:
- gaudi/Gaudi!149 (merged) (GAUDI-1048)
- gaudi/Gaudi!161 (merged) (fixed compilation warning)
- gaudi/Gaudi!160 (merged) (bugfix in ThreadPoolSvc)
- gaudi/Gaudi!159 (merged) (improved error report in listcomponents)
- gaudi/Gaudi!166 (merged) (GAUDI-1211, GAUDI-1212)
- gaudi/Gaudi!163 (merged) (LBCORE-1111, LBCORE-1112)
- gaudi/Gaudi!170 (merged) (GAUDI-1209)