Rack visualization

**Please don't  merge! Only for preview**
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Changes:
- new rack visualization.

TODO:
- compress CSS,
- split scripts,
- connect with asset API.
Do it in angular

var my_app = angular.module('MyApp').config(function($interpolateProvider) {
    $interpolateProvider.startSymbol('{$');
    $interpolateProvider.endSymbol('$}');
});