Made watch.sh executable on unix

`chmod +x watch.sh`
Merge pull request #129 from danshearmur/watch-execuatble

Made watch.sh executable on unix
Shorter clearfix for IE8+

removed z-index for IE6/7
removed :before as it is not necessary for IE8+
Merge pull request #133 from maxhoffmann/patch-1

Shorter clearfix for IE8 and above
Merge remote-tracking branch 'upstream/master'