Moved bower_components into the root directory, instead of under app/

Make amore sense not to have it in app/ since this is not components part of the developers code.

Only file I am not 100% sure of is Gruntfile.js. the original file had this:

    // Automatically inject Bower components into the app
    wiredep: {
      app: {
        src: ['<%%= yeoman.app %>/index.html'],
        ignorePath:  /\.\.\//
      }<% if (compass) { %>,
      sass: {
        src: ['<%%= yeoman.app %>/styles/{,*/}*.{scss,sass}'],
        ignorePath: /(\.\.\/){1,2}bower_components\//
      }<% } %>
    },

While the new file has this:

 // Automatically inject Bower components into the app
    wiredep: {
      app: {
        src: ['<%= yeoman.app %>/index.html'],
        ignorePath:  /\.\.\//
      }
    },