gruntjs/grunt-contrib-livereload — pull request #35 by kud (2013-03-29 16:20:50+00:00)
Title: Fix long time livereload loading. 

Sometimes, I don't know why, livereload.js is really slow to load. As it's synchronised, it blocks all my other scripts and I can't work. So adding async="" is a (temporary) solution. It still work when it's loaded just after.