fix 'Undefined variable' notice

fix for Notice: Undefined variable: is_IE in \wp-content\themes\reverie-master\lib\clean.php on line 127
Fixed a line that refered to stylesheet directory instead of template directory.
Merge pull request #169 from dalexisv83/jQueryNew

Fixed a line that refered to stylesheet directory instead of template di...
Merge pull request #162 from kalligator/master

fix 'Undefined variable' notice
Merge branch 'master' of github.com:milohuang/reverie