* remove unused icons form chosen icons.
 + added chart.line.js.
 * updated chart.line.js.
 * ajusted variables of article view.
 * ajsuted color and text layout.
 * ajusted order of buttons for bootbox modal.
 * ajusted code of droppable.js.
 * rebuilt zui.
 * added new type 'custom' to the modal trigger.
 + added image ready to get real size of an image before loaded.
 + updated lightbox.