see description

Fix: https://github.com/DZCP-Community/DZCP-1.6/issues/124
Move Database Functions to database.php
New Function for mysqli_insert_id() use _insert_id();
Multi Picture format support for slideshow() * png/jpg/gif
Bugfixes & Code optimization on slideshow & admin menu
Check in all Database Functions of $mysql is instanceof mysqli
Remove function txtArea()
Add _no_entrys pages for listes