Added Grunt task for livereload and image minification to the build script

Bran!

As promised, I added 2 new tasks to the gruntfile, livereload and watch.

I also updated the readme with explanation and the package.json with the two new grunt-contrib packages.

Furthermore I added 3 lines of content to the Jasmine task, those made my life a lot easier when running grunt test. It is possible to load a specific template for the tests, keep the specrunner file after the testrun. And load specific javascripts for support when testing with jasmine tests. That's what these options are for

Später,

Chris