Merge pull request #8 from colorpeach/master

fix ie9 can not use less
Merge pull request #9 from colorpeach/master

add grunt
Merge pull request #10 from colorpeach/master

merge xinhuarao branch
Merge pull request #11 from colorpeach/master

resolve and generate Xicon.css
modify fast-backward and backward
Merge pull request #9 from tanxuewei/master

modify fast-backward and backward