Add MultiMaps warning
Improve concurrency in AsyncWriteEngine
Improve Serializers
close in example
Remove unused import
Make async threads deamon by default
Issue #69 test.
Merge pull request #70 from kzadorozhny/master

Issue #69 Test
Various fixes
 - circular queue
 - compact
 - async performance
Merge remote-tracking branch 'origin/master'
Temporary fix for Issue #69
Fix stuff in StorageAppend engine
Rename StorageWriteAheadLog back t oStorageJournaled
Refactor hashing
Fix append storage
Fix large array serialization
Fix failing tests after hash refactor
Remove verbose stuff from unit tests
yet another fix for hash unit tests
Test for potential problem