6:
 - refactoring: persister division
6:
 - scala pickling deps
6:
 - refactoring
 - simple journal fs store
6:
 - fs write bug fix
 - change fields type from Array[Byte] to Seq[Byte] in case classes
6:
 - simple fs store specs fixed
6:
 - refactoring
6:
 - import optimize
6:
 -blocking checkpoints
6:
 - tests and minor fixes
6:
 - remove ops were added to test
6:
 - background thread for journals compaction;
6:
 - refactoring - file read write and serialization split;
6:
 - move flag check
6:
 - ahead log strategy impl
6:
 - limit ahead log chunk in bytes;
6:
 - initialization;
6:
 - ahead log store implementation;
6:
 - ahead log store test;
 - bug fixes;
6:
 - bug fixes;
 - debug prints removed;
6:
 - bug fixes;