Qr decode extension offline problem

[Nader_El-Sayed]

Qr : Read and Create Bar Code offline

ChangeLog Version 2 Changes/Bug Fixes Replaced relative filePath with abstract filePath in DecodeQrCode and DecodeBarCode methods.But both Generate methods still use relative filePath. Thanks to @Nader_El-Sayed and @Taifun

Thanks @vknow360