* 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)

* cherry pick

* fix bug when paddle upgrade (#606)

* add jpg

* quant quick_start update

* quant quick_start update

* post_quant_static: remove the cache params, add optimize_model params, test=develop
Co-authored-by: NBai Yifan <me@ethanbai.com>

* use default settings and update benchmark data
Co-authored-by: Ncc <52520497+juncaipeng@users.noreply.github.com>

* add zh doc for quant_post_only_weight

* fix details

* fix details

* fix

* update

* Add mkldnn quantization demo and document