add notice-log for every request:

[Wed May 28 15:06:12 2014] nc_request.c:59 req 3 done on c 11 req_time: 0.353 type: SET narg: 3 mlen: 35 key0: kkk-3, done: 1, error:0
move notice to a function
adjust coding style after Manju's review

1. use MSG_TYPE_CODEC instead py script,
2. del colon in notice log
notice-log upgrade

1. add peer ip:port on notice log
2. fix missing of notice_log in pipeline
increase max mbuf size
Merge pull request #226 from idning/req-notice-log

add notice-log for every request
Merge pull request #234 from eleusive/master

increase maximum mbuf size
increased mbuf max size to 16 MB