ToDoList:

[ ]basic optimize
[ ]tcp client reconnect(think about using a queue)
[ ]modify the echo sample
[D]format
[D]logger optimize
[x]remove RefPtr and using shared_ptr/weak_ptr
[x]command flags
[D]samples
[D]Delete/Add queue
[D]FreeBSD Support
[D]UnitTest

0.1
[x]logger
[x]remove writev version
[x]unordered_list
[x]buffer
[x]reactor
[x]message queue(1:1)
[x]message queue(m:n)
[x]timer
[x]RefObject and RefPtr