fixed bad string concatenation

fixed wrong var in exception

changed base class for getInstance method argument

improved error handling and uploading files without extension

Added possibility to use md5(attribute) as path placeholder

Merge pull request #14 from soulhunter1987/bugfix_resizefix

Фикс важного бага с удалением и возможность настраивать создание превьюшек

fix undefined index for console app