* ktx-software: Add version 4.0.0
* ktx-software: Add autoupdate for url, hash, extract_dir and licence fields
* ktx-software: Remove "license" property from autoupdate
"autoupdate" does not allow additional properties (https://ci.appveyor.com/project/r15ch13/main/builds/39191492/job/pt015o9cri22ch60#L491)
* Update ktx-software.json
Point to latest licenses instead of version specific ones.
