The old API is no longer reachable, thus got replaced.
This also removes the obsolete skin preview download because the mod is capable of generating them automatically.
Co-authored-by: CallMeDax <142984237+CallMeDax@users.noreply.github.com>
Adds a filename split seperator setting that lets you choose between old style `_` and `.` because dot is the only char that isn´t allowed in playername but in texturenames.
Default value is `_` to keep it compatible with older versions, while `.` offers a solution to fix #54.
