issues/60 - updated products categories index pages
/issues/58 - updated index pages
issues/57 - updated categories index page and products show(-ekranirovanie)
updated routes product only show, categories only index, show
changed defoult level, updated categories index
issues/63 - added google_analytics to layout
small changes
issues/61 - added breadcrumb to categories index and products show
issues/62 - added method - get random products