* fix precision of mp

* fix bug of seed

* fix dp

* print group

* update, test=develop

* fix amp bug

* fix name of wordsize

* fix model parallel

* rm parallel_help.py

* add embedding

* add pp dygraph, test=develop

* add pipeline layer

* add clip/check

* add amp & clip grad in dygraph

* add logging

* support dp & mp

* add model parallel support in dygraph