update NerdsAsset

* add css file to style upload file input field
up MarketPlace controller

* add action to handle file uploading for item
up UsedItem model

* fix a small bug. Show only items related to active categories
up UsedItemPhoto model
add view for item images

* show item images no ‘edit item’ page
add view to upload files

* add from on the ‘edit item’ page
up edit item page
up css
add css filу

* styles for ‘choose file’ button
up script.js

* send foom right after files for upload was chosen
css up
up composer config
up MarketPlace controller

* up edit action
* up upload action
up UsedItemPhoto model

* up validateUploadedFiles method
up edit item view

* show error/success messages
up
up MarketPlace controller

* code refactoring
up UsedItemPhoto model

* code rafactoring
up views

* code refactoring
code refacroting