add sample codes,license to readme
add sample codes!
why there is a copy of readme named :W
looks good
readme code must be niiiiiiiiiice
add install guide
Merge branch 'dev'

* dev:
  add install guide
  readme code must be niiiiiiiiiice
  looks good
  why there is a copy of readme named :W
  add sample codes!
  add sample codes,license to readme