check mongo reply data stream
bugfix: lua mongo result
big-endian encoding bson objectid
typo fix
release v0.3.1
Merge pull request #119 from cloudwu/dev

release v0.3.1
bugfix: double free
cluster bugfix : add socket.header to decode bigendian header
update history, and release v0.3.2
Merge pull request #3 from cloudwu/master

20140624