Better PNG Sequence and Gif Support

Developer's Note

• Gazo Tuber used to use an alternative for Gif file which is PNG Sequence. I thought removing PNG Sequence would be a good idea since I already got Gif Support now. Turn out, some Gazo Users are more into PNG sequence than gif. This is because gif will destroy the texture of the image. So after I removed the PNG Sequence, I had to put it back. I thought it would be such a pain but, actually it weren't that difficult because I found a better way to implemented it. Thanks again for the supports, cya!