Fix python35 ci random fail

 add test_all_data in test_analyzer_ner

support anakin for only-cpu environment

Clean

refine fusion lstm/peephole and fusion gru

* add save_inference_model for Trainer

* add comment

* update comment

* fix mac compile

* add unit test

* update API.spec

* revert cpplint-cpp-source

add error info for nccl not found

fix parallel run dist unit test

Disable feed_fetch_unit_test temporarily

fix cuda9 docker build

Open python35 ci

Use double to reduce

* Add intermediate

* fix flatten/squeeze/unsqueeze

* Considering compatibility issues, we could not fix the origin op

* follow comment

* reset the shape of XShape