Adjust delete dir existing check logic.
Fix Object.shift utility.
Add costume png compress & adjust png optimize interval.
Fix delete dir logic.
Add TODO items.
Add pics.
Fix ignore rules.
Remove temp pics dir.
Add ignore rules.
Move const into BstConst class.
Remove old logic.
Add TODO thinking of upk parsing logic.
Update comment.
Add upk list data & remove old data.
Pre process done.
Use const class to handle file name.
Adjust broken file name & add comments & add apis.
Fix comment.
Fix comment.
Fix comment.