Update some tests
Improved javadoc TransactionalTask
docs revise
docs revise
Improved Javadoc for XmlConfigBuilder
Improved Javadoc for TcpIpConfig
Small doc cleanups.
Ported InitialMembershipListener impl from master branch.
Merge pull request #626 from pveentjer/improvement/3.0/javadoc

Improvement/3.0/javadoc
Improved Javadoc for SSLConfig
Improved javadoc for SocketInterceptorConfig
Improved javadoc for GroupConfig
Merge pull request #627 from pveentjer/improvement/3.0/javadoc

Improvement/3.0/javadoc
async invocation fix
Merge branch '3.0' of github.com:hazelcast/hazelcast into 3.0
Small test fix.
Improved javdoc on the Config subclasses
Merge pull request #628 from pveentjer/improvement/3.0/javadoc

Improved javdoc on the Config subclasses
Changed version to 3.0
Added javadoc for HazelcastInstance tx methods.