Now maximum file size set manually also php moved after html and shows via ob_start, ob_get_clean
Small text and design improvements.  Code commented.

App:
+ Pagination now start from page 1 (not 0)
+ Search by one search query word

Design:
+ Text shadow
+ Gradient background for books list items
+ Abonement info now look as sticker
+ Source of item now showing by click to special link
+ Show pages count