Version 2.1.0, Pre-Release 3

This version mainly fixes bugs, and makes a lot of changes on the back-end. The quality of a lot of aspects of the game should be increased, especially some of the newer menus. In addition, newer systems like skins and resource packs have been tested and checked for errors, and should hopefully be ready for production.

@Sissiogamer1 @TheBigEye @Litorom @lino-levan

Full Changelog: v2.1.0-dev2...v2.1.0-dev3