* yaml support no constructor

* fix yaml constructor in eval & export

* fix typo

* revert config

Updated voc.py in case error occurs when xml file contains self closing node <difficult/>.

* modify the ch_in&ch_out of the BasicBlock

* add the type convertion of the ch_in and ch_out & update gitignore

* revert the changes of gitignore

* fix label_list for mot, add warnings

* add result txt format, test=document_fix

* fix readme of mtmct, fix paddle.disable_static, test=document_fix

* fix cfg, test=document_fix

* remove paddle api

* unstructured prune for picodet

* cherry-pick cfg modelzoo readme

* cherry pick modeling engine source

* cherry-pick deploy python mot

* fix problem of s2anet while deploying

* correct problem of s2anet TestReader

* add dota default category

* update citation

* update citation

* add score cls_id for deepsort, fit some detectors and pplcnet reid

* fix configs/mot/README

* add sge attention on fpn

* add iou head

* add config, fix head

* fix iou offset weight

* fix fairmot centerhead