Update README with more information

* Where to find the original model and texture files
* The software used for converting these textures

README.md

 A repository holding PNG textures from Super Smash Bros. Ultimate. All files have been converted from the original NUTEXB files with [Switch-Toolbox](https://github.com/KillzXGaming/Switch-Toolbox). Some textures, especially those whose width and/or height are not a power of 2, or are cubemaps, also have DDS files.
 
+The original model and texture files were uploaded by Random Talking Bush and can be fouund at: https://mega.nz/#F!AAwWzCjT!Zd5kKpuQcE647DSRtpFShw
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 This repository uses Git Large File Storage (LFS), in order to keep the repository sizes more manageable. See https://git-lfs.github.com/ for more information and how to get the client.
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+The following software has helped me in conversion of the textures:
+* [Compressonator](https://gpuopen.com/compressonator/) - A tool suite from AMD (Advanced Micro Devices) for texture and 3d model compression, optimization and analysis using CPUs, GPUs and APUs. Git repository: https://github.com/GPUOpen-Tools/Compressonator
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+* A custom-made program to convert multiple textures at once, written by me and KillzXGaming: https://github.com/RQWorldblender/TextureConverter | Upstream repository: https://github.com/KillzXGaming/TextureConverter