* remove hardnet39

* remove hardnet39

Signed-off-by: Ndaquexian <daquexian566@gmail.com>

* [Dy2St]Fix cascade_rcnn export model problem (#6468)

* [Dy2St]Fix cascade_rcnn export model problem

* [Dy2St]Fix cascade_rcnn export model problem

* fix import for mot

* fix import for mot deploy

* fix lazy import mot

update instruction of DarkLabel

* [Dy2St]Fix cascade_rcnn export model problem

* [Dy2St]Fix cascade_rcnn export model problem

* fix pphuman det mot doc, test=document_fix

* fix doc, test=document_fix

* fix doc, test=document_fix

* add doc for keypoint development

* fold examples

* some advice

* update human gif & qrcode, test=document_fix

* update link, test=document_fix

* add cascade vitdet

* cascade vit

* fix for model export

* add vit cascade cfgs

* update ppdet docs & remove static code, test=document_fix

* add pphuman doc, test=document_fix

* update action doc, test=document_fix

* update activity, test=document_fix

cast dtype in load_pretrain_weight

* optimize pphuman action document

* add en doc

* add break in counting for pphuman

* fix break in doc and codes

* fix mot break in region, test=document_fix

* fix region_polygon and region_type, test=document_fix

* add tools for get_video_info, test=document_fix

* update attr docs

* update more

* update docs

* given inference model path, download model automatically

* encapsulate auto download model as a function

* given note that default model dir is download link

* change attr model download path to https://bj.bcebos.com/v1/paddledet/models/pipeline/PPLCNet_x1_0_person_attribute_945_infer.zip

* [smalldet]add xview sliced config

* [smalldet] add Dota and xview config

* [smalldet] add xview and dota config

* [smalldet] fix path of weight

* [smalldet] add readme

* add ocsort tracker

* add ocsort deploy

* merge develop

* fix ocsort tracker codes

* fix doc, test=document_fix

* fix doc, test=document_fix

* attribute docs update

* fix mtmct

* update docs