* add 1.5.1 whl and fix some bugs (#1010)

* add windows install whl

* whl and bug

* fix some bugs

* update 1.5.1 cn API

* add url

* dygraph translation

* cn doc bug fix

* translate dygraph according to 1.5.1 website + bug fix

* break up layers and change index of layers

* prettify script