Add V2.0, it's a big deal
Add block bloom filter
Add value length to SST
KV is compacted
Packed k/v
Add read
Add binary search
ADD compact k/v pair and binary search
Del some codes(getX) from buffer.c
Add all-in-one merge count lose
ADD
Add scryed to meta
Add scryed SST to meta
Add test object to .gitigore
recovery
Fixed to ITEM_SIZE
Fixed all ITEM-SIZE to fix-length
Add merge thread
Add BGMERGE flag
Add log