[play][disk] Init block writer #32
[play][disk] Init block writer #32

- the block is ok, but without index it can't be read out
- use binary.PutUvarint for encoding time and int value

xephonhq/xephon-k,xephonhq/xephon-k,xephonhq/xephon-k,xephonhq/xephon-k,xephonhq/xephon-k,xephonhq/xephon-k