tune assert statments
add some assert, add method "render"

I wonder rc is to be dict or list
improve hub and log
tune hub, add util.py

util.flush could used for bridge I and hub
rename bb.py -> web.py
add debug infos

msg head and msg body
fix shell client
improve auth, and all codes for Python3
all are writen for Python3
combine i and hub, unstable

and split hub into hub.py + inst.py + other.py