Start join mongodb
upload function
Upload function +
Upload to MongoDB GridFS
fix link manager, modify admin sidenav.
GridFS upload & fix bugs.
Refactoring project files folder.
Res path.
Modified upload mongodb crud.
Change configDao to MongoDB.
uploadDao need a count method.
Comment Dao in MongoDB.
Comment works.
Modify short id.
Change comment id to String.
Need to reverse upload list.
Upload display order by _id DESC.
Update .gitignore
Update UploadDao.
Begin to move all from mysql to mongodb.