attach search view to layout -- https://github.com/davidsulc/backbone.marionette-atinux-books/commit/b20d98387a9cb6f2c172ddc3292ca48137f80321
fetch books -- https://github.com/davidsulc/backbone.marionette-atinux-books/commit/3331130f30599156137f34df72da303501228ba7