* Add mobile device deploy document (#624)

* add dygraph prune quick_start

* add mobile deploy doc

* complete deploy doc

* add images

* fix a error;

* fix some error
Co-authored-by: Ngmm <38800877+mmglove@users.noreply.github.com>

* fix prune_io
Co-authored-by: Ngmm <38800877+mmglove@users.noreply.github.com>

* Add missing index.rst (#650)

* Modify readme (#651)

2. Add missing api index.rst
3. Fix comment in filter_pruner
4. Update links in API docs

* add export model for ofa (#548)

* OFA demo for ernie (#493)

* cherry pick

* fix bug when paddle upgrade (#606)

* add jpg

* fix prune demo batchsize

* fix lr shcedule in prune demo
;

* remove softmax from demo/models
Co-authored-by: Nwanghaoshuang <wanghaoshuang@baidu.com>

* fix prune demo batchsize

* fix lr shcedule in prune demo
;
Co-authored-by: Nwanghaoshuang <wanghaoshuang@baidu.com>

* update

* fix

* quant quick_start update

* quant quick_start update