Deleting unnecessary files

Especially weisuocat.jpeg which is super annoying to me..well did i add
it?!
Adding new chatroom feature

Adding new chatroom feature:
- now support simplified Chinese

Things to do:
- send button doesn't work. need to make it work
- text does not appear as simplified Chinese (gb2312) but UTF-8. need to
fix it.
Merge pull request #1 from carrywind123/master

Deleting unnecessary files and adding new chatroom feature