Supersedes the 'fsep' setting by automatically detecting
the texture name in both, the skin list and the updater
scripts.
New, automatically fetched skins will now always use the
'.' delimiter to avoid player name issues.
In case of ambiguous texture names, a warning is logged.
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.
