* add AutoConvert

* add unitest

* amend merge&slice

* amend default dist_attr

* update doc&improve coverage

* add interface dist_context

* tiny modify

* AutoParallel Save&Load

* tiny modi

* update func name

* tiny fix

* add NotImplementedError

* fix doc

* update func name

* update func param

* update interface

* add unitest & modi make_data_unshard

* update unittest

* update unittest

* fix unittest

* fix cmakelist

* update unittest