Update version to 2.2.0 (bytedance#217)

Update lightseq version (bytedance#162)

bump version to 2.1 (bytedance#118)

bump version to 2.0.2 (bytedance#76)

* Update build_check.yml

* Update setup.py

add links of other readme in the master readme (bytedance#70)

* add links of other readme in the master readme

* modify links of training/inference readme

* modify links of training/inference readme

Update README.md about fast training (bytedance#55)

Multi lingual (bytedance#20)

* support multi lingual nmt

* fix typo

Co-authored-by: wangxiaohui <[email protected]>

Update performance.md

remove redundant blank lines

Update README.md

Update README.md