Merge pull request #99 from sajinidesilva/slots_Imp

Profile changes and refactoring
Changes to support MSSQL
Merge pull request #100 from sperera/master

Changes to support MSSQL
Modify SlotDeliveryWorker to save queue list in a ConcurrentSkipListSet.
Synchronize DLC Queue creation.
Merge pull request #102 from akalankapagoda/syncDLCQueueCreate

Synchronize DLC Queue creation.
Merge pull request #101 from akalankapagoda/concModf

Modify SlotDeliveryWorker to save queue list in a ConcurrentSkipListSet.
performance optimizations for write speed and fix to recover thread exceeding issue with a configured wait
Merge pull request #103 from hastef88/performance_optimization

performance optimizations for write speed and fix to recover thread exce...
Unused imports, missing stack traces in logging, resource handling issues and java doc issues fixed.
copyright updated
Merge pull request #94 from Asitha/code-cleanup

Code cleanup
updating ack handling.
removing ack handling from subscription implementations.
handling an edge case when handling acks.
Merge pull request #104 from abeykoon/test_slot_impl_2

Moving Ack Handling to Disruptor
removed message extra expiration tracks