fix slim export model

Update RADME and joinus.png

Update joinus.png

Keep the parameter names the same as python

rm rec_char_type

Update the README of PPOCRLabel

[TIPC] fix sar infer benchmark

[tipc] fix rec pact hang and east hang

* update VQA README.md and add en version

* restore ppstructure/README.md

Update joinus.png

Update joinus.png

Update PPOCRLabel readme

update paddleocr version no

add how to finetune doc

rec return result

rm fasttext