Looking pretty ready for finally getting round to actually async reading and writing some data :) Seems to max out at about 5000 file creations or deletions per second on NTFS. No idea if this is any good of course ...

Added batch async directory and file delete + unit tests for these.

Finished Windows native implementation with Boost.ASIO attachment of HANDLEs.

Implemented auto fsync on close.

Stopped it repeatedly locking and unlocking the opslist during batch ops.