typofix in zh docs
use new rux theme: flask style pygments.css
simple example application with CURD.py
add app shot link
add flask to readme's description
update rux theme;sample app;update types
add sample app link in readme
Merge branch 'dev'

* dev:
  add sample app link in readme
  update rux theme;sample app;update types
  add flask to readme's description
  add app shot link
  simple example application with CURD.py
  use new rux theme: flask style pygments.css
  typofix in zh docs