Update imports in sopds_web_backend_view

from random import randint

import urllib

from django.shortcuts import render, redirect

from django.template.context_processors import csrf

from django.core.urlresolvers import reverse, reverse_lazy

from opds_catalog import models

from opds_catalog.models import Book, Author, Series, bookshelf, Counter, Catalog, Genre

#from opds_catalog.settings import MAXITEMS, DOUBLES_HIDE, AUTH, VERSION, ALPHABET_MENU, SPLITITEMS, FB2TOEPUB, FB2TOMOBI

from opds_catalog.models import Book, Author, Series, bookshelf, Counter, Catalog, Genre, lang_menu

from opds_catalog import settings

from constance import config

from opds_catalog.models import lang_menu

from opds_catalog.opds_paginator import Paginator as OPDS_Paginator

from sopds_web_backend.settings import HALF_PAGES_LINKS