fixed Queue.clear() method
Fox possible locking problem
Merge pull request #83 from bonifaido/master

Fixing Queue.clear() method
Fix DeadLock in loading the SerializerBase Class, Issue #84

Credit goes to Patrice Freydiere
Fix Issue #77, errors in StorageAppend
Fixed Issue #82, Commit with async write hangs when POJOs are used.
Improve concurrency in StorageAppend engine
Concurrency in Storages, StorageAppend defrag.
Update README.md
Rewrite Store to support parallel writes.
Merge remote-tracking branch 'origin/master'
Test for Issue 86
Fix for Issue#91, remove same optional classes not compatible with android
Fix for Issue#91, remove same optional classes not compatible with android
Add test for Issue #90
Add optional size counter to Maps and Sets
Add UTF-8 into POM
Fix Issue #90, serialization was failing with compression enabled.
Add example howto use Value Serializer in Map
Move CompressionWrapper into Serializer