remove the useless line
add one more note
use isspace to judge wihte spaces and tabs and newlines
fix bug: escaping of double qoute
readme for install and todo
Merge branch 'dev'

* dev:
  readme for install and todo
  fix bug: escaping of double qoute
  use isspace to judge wihte spaces and tabs and newlines
  add one more note
  remove the useless line