Create separate lib for deprecation in order to make eso create a second file for the save variables.

Author Orionik <orionik.eso@gmail.com>
Author date 2022-08-06 15:15:40
Author local date 2022-08-06 17:15:40 +0200
Committer Orionik <orionik.eso@gmail.com>
Committer date 2022-08-06 15:15:40
Committer local date 2022-08-06 17:15:40 +0200
Commit 1172d2cee973286c1e1298e376e37ecee27c147f
Tree 3cc1518349f41c28004e8b3d7dd63c97f9a3275d
Parent 96a1c40d8ee1c5485fbcf4baefd03ae6d6792758
Create separate lib for deprecation in order to make eso create a second file for the save variables.
This way we have one file containing the data in the format before version 3 which can be used as backup in case of a problem and a second file for the new save format after version 3.
And we finally have a new save file smaller than the original which was one of the reason for this big save change.