update version

update easyrec version to 0.7.1 (alibaba#420)

[feature]: add continue train on evaluation data (alibaba#399)

* add support for continue train on evaluation data
* fix sync_replicas_optimizer que runners

[feat] update version to 0.6.4 (alibaba#397)

* update version to 0.6.4

add support for release v0.6.3

[feat]: add avx string split feature (alibaba#364)

* add avx string split feature
* add pip requirement for eas_prediction
* update incr_record ops
* add step counter hook

[feature] add client demo for sending request to easyrec processor (a…

…libaba#363)

* add client demo for sending request to easyrec processor
* fix code style

add missing files

update version to 0.6.0

[feature]: add pycharm vscode docker environment (alibaba#293)

* add pycharm and vscode document

* add post transform to fix links

* recover git lfs configs