Update joinus and thirdparty 

Update joinus and thirdparty

【PPOCRLabel】: Improve User Experience and Efficiency and BUG Fixed

fix cmd error

add eps

Create kie_en.md and enhanced_ctc_loss_en.md

Create community_contribution_en.md

FIXED: process rotateImgAction after autoRecognition without any click on file list will raise A ERROR : array out of index

Correct some spellings & links in documents.

add ctc blank to android demo

update metric

vqa code integrated into ppocr training system

[tipc] add supplementary chain

Update joinus.png

Update joinus.png