Reflect everclear's review.
Revert "Temporarily delete LogFileReaderV3o for compile."

This reverts commit 4f630a19cd3e70a0051f7a5581d83bce9b5e7473.
Change logger name of LogFileServiceV3o and LogFileWriterV3o.

- fix the wrong name of logger.
- log name supposed to be started with araqne.
- but it was start with logpresso.
Add LogFileReaderV3o.
Chnage LogBlockCursorV3o.

- delete KeyFilePath related code.
Change LogFileReaderV3o.

- delete crypto related code.
- delete mult thread related code.
Changes LogReaderConfigV3o.

- delete KeyFilePath related logic.
- delete crypto related logic.
Changes LogFileServiceV3o.

- comment in newReader.