Merge pull request #21 from MaxRomanov4669/master

add validation to ads and category model, fix views
Monolog
update database
update database
Merge pull request #22 from Ed-88/master

update database
delete admin model
delete admin model
Merge branch 'master' of https://github.com/nix-php-training/ads-board1
Merge pull request #23 from Ed-88/master

delete admin model
add create, edit, delete for ads
update and add edit, delete, create ads