2.0.6.RELEASE

Change log:

98c7418 GH-800: Fix Zombie Fencing
4718c32 Doc: Partition Assignment
e7a1206 GH-777: Reset running on stop()
a7f75ae GH-782: Fix GenericMessageListener Javadocs
111b4c1 GH-774: Rethrow e in KT.executeInTransaction()
5a93ace GH-753: Close transactional producer on error
6d456ea GH-719: Exclude Spring 4.X dependency
02d4a45 GH-686: Handle tombstones in Json Ser/Deser
ea52aca GH-690: Propagate AfterRollbackProcessor to child
d5fd2c8 Add licence and notice to all artifacts
c5aaef5 GH-683: Fix Transactions with ErrorHandler