* Add MSRA dataset

* Add ernie_tiny seq-cls task case

* Update README.md

* fix python2 bug

* Update README.md

Polish README
Co-authored-by: NZeyu Chen <chenzeyu01@baidu.com>
Co-authored-by: NSteffy-zxf <48793257+Steffy-zxf@users.noreply.github.com>

* uniform file name convention

* update version

* update docs

* update docs

* optimize demo and cv reader

test=develop

* update demo

* simplify img cls demo

* remove elmo demo

* simplify multi-label cls demo

* simplify multi-label cls demo

* simplify img cls demo

* simplify text cls demo

* simplify lac demo

* simplify ssd demo

* simplify qa cls demo

* simplify regression demo

* simplify reading comprehension demo

* simplify sequence labeling demo

* simplify senta demo

* restore the removed code

* modify cv reader

* update autodl

* fix reader that drops dataset in predicting phase

* update the directory of tmp.txt

* update seq-label task

* Update the demo text-cls and seq-label

* Update teh demo text-cls and seq-label

* Fix the encoding format