add base bin log support
adjust key/value max size, change step commit in flush
add dump and load
add global lock to handle replication
move bin log to replication package
bin log and relay log use same log
add expire for the kv type; simplify the listMetaKey format
Merge branch 'develop' of https://github.com/siddontang/ledisdb into develop
add expire for the kv type; simplify the listMetaKey format
change log name suffix format
for test cases : do remove db file instead of call function db.clear at the very start
add replicate for relay log
change the type of return score
fix the type of return value from zscore command
fix bug - unify the return score type to bluk while call rangeXXX
Merge branch 'zset_score' into develop
don't export some error
add relay log, add quit channel
supply function of expire/ttl for the other data types - list, hash, zset

fix tiny mistaks
remove relay log