Merge pull request #7 from ispiridonov/master

Sendmail.pm Fix bug encodings
Remove exec right from modules.
Add name of template in error handler.
DB.pm:
- fix uninitialized value in string eq at line 330
DB.pm
- add check 'IS NULL' or 'IS NOT NULL' in condition of method 'delete'
DB.pm:
- add function '_serializeCondition' to 'delete' method