Added python script to generate spritesheet for CSS.
Generate css sprite animations automatically.
Added random move.
Update sleep/still images.
Update sleep/still images.
Updated still image.
Update assets url.
Added python script to replace args.
Added missing js template.
Fixed spritesheet offset.
Commit assets to gh-pages.
Merge pull request #2 from elin-moco/gh-pages

Make huhu move randomly.
Upload assets to firefox.club.tw.