update test case for openresty(lua)
remove cn readme

we don’t need Chinese explain
update read me
update doc
use iterator to read many consistently in api

for a read api, it not uses lock, so multi read in a api may cause some
unpredictable when something writes at same time.
delete code about unsupported feature like password and SSL connection
update ledis-py README
fix typo
add ledis-dump tool
refactor, bin rename to bit, rename datatype
add support for read and print bin log
add handle binlog tool
add MasterInfo for replication
add ledis-load
update read me
Merge branch 'develop'