DocxConverter image name/path && paragraph removing rules
DocxConverter image name/path && paragraph removing rules

- use hash without extension as image names
- all images are placed in asset/img folder
- remove lang-only paragraphs which has an empty content

QingYun/Wollongong-101-Objects,QingYun/Wollongong-101-Objects,QingYun/Wollongong-101-Objects