Close FileInputStream in FileSystemBufferedReaderDomainEventStream from FileSystemEventStore after event stream read.
Merge branch 'AXON-184-close-fileinputstream' of git://github.com/hovenko/AxonFramework into axon-2.0.x
Finalized implementation of Closeable on DomainEventStream

Made sure all places where Axon reads a DomainEventStream are close when
the DomainEventStream implements Closeable. Added javadoc and merged the
CloseableUtils into IOUtils.

Issue #AXON-184 Fixed
Issue #AXON-187 Fixed