Remove all whitespace

The results of running this command::

    find . -name \*.js -print0 | xargs -0 perl -p -i -e "s|[ \t]+$||"

(Split from #136)

Gruntfile.js

@@ -131,6 +131,7 @@ module.exports = function(grunt) {
                 browser: true,
                 eqeqeq: false,
                 loopfunc: false,
+                trailing: true,
                 globals: {
                     OpenSeadragon: true
                 }