fix for 403b3e8bfa48721e82eddb167d162f18d469b2d4
don't wrap .css file in 'use strict'-scope.
switch to "grunt-bowerful"!
replacing "grunt-bower-task" and "grunt-bower-concat", bower deps are set in
Gruntfile, removing bower.json, support for css as well.
added normalize.css via bower :-)