Update

Signed-off-by: t32k <ijok.ijok@gmail.com>
Update Gruntfile.js
Merge pull request #11 from pocotan001/patch-1

Update Gruntfile.js
Update Gruntfile.js
Merge pull request #12 from pocotan001/patch-2

⊂二二二（ ＾ω＾）二⊃
Fix read.me img
Fix read.me img
Update package.json
Update README.md
Update grunplugin
Replace Compass Sprite to Spritesmith
Add grunt-autoprefixer
Add grunt-autoprefixer
Good Bye Compass, Good Bye Ruby
Change Coffee file