Intro paragraph authored for DDS chapter
Look n feel improvement.
Reference to Wildcard Configuration added.
Typo correction
Look n feel improvement.
should prevent cyclic wait-notify
Merge pull request #3167 from mst-appear/feature/log4j2

Log4j 2.x support (issue #2345)
Merge pull request #3520 from gurbuzali/cyclic-fix/master

should prevent cyclic wait-notify
Merge pull request #3505 from mdogan/fix/3.4/serversocket

ServerSocket and SocketAcceptor thread should be closed/interrupted befo...
Merge pull request #3506 from mdogan/imp/3.4/caller-uuid

Avoid caller uuid serialization if caller uuid is not overridden on caller side
Merge branch 'master' of https://github.com/hazelcast/hazelcast
made some elaboration on write batch size property
possible fix for test failure testIssue1085WriteBehindBackupWithLongRunnigMapStore
use assertOpenEventually for latch in testSubmitToKeyOwnerRunnable
some renamings
Replaced ConcurrentHashMap references with ConcurrentMap.
fix possible OOM due to the not processing of write-behind queues on backup nodes.
test fix
unit tests for ISet
update