Merge pull request #11 from Nenotriple/gimp_3.0_support

Gimp 3.0 support

Update README.md

Update README.md

Update README.md

Add Linux information.

Simplify installation instructions.

Create realesrgan-ncnn-vulkan

Rename ai_upscale_resrgan.py to gimp_upscale.py

Fix installation of plug-in when packaged as a folder

Organize

Update README.md