Merge pull request #894 from angel-kulikov/master

UPD: small fixes
Merge pull request #895 from angel-kulikov/master

UPD: small fixes
Merge pull request #896 from angel-kulikov/master

fix #807: Исправлена ошибка, возникавшая при удалении категории, к которой привязан товар
Merge pull request #897 from angel-kulikov/master

UPD: small fixes
Merge pull request #898 from angel-kulikov/master

UPD: small fixes
small fixes
Merge pull request #80 from yupe/master

UPD: merge with yupe/master