Removes unused RecoveryLogDeserializer
Clarifies TODO comment in CommittedTransactionRepresentation
Resolves TODO in LogEntry by adding the extra header length in the toString() of Start
LogVersionRepository.incrementAndGetVersion refinements

LogVersionReposiotry.incrementAndGetVersion now throws IOException
ReadOnlyLogVersionRepository.incrementAndGetVersion will fail on
 the second call if it happens.
Merge pull request #2657 from digitalstain/master

Bunch of small refinements in kernel