revised reload warning, fixed issues caused by reloading

• fix update checker showing wrong link, switch to SPIGET api for checks

• added warning for server reloads

v1.1

fixed all known bugs/crashes/errors

- switched from tchristofferson's ConfigUpdater to exlll's ConfigLib-paper

- added `/mail version` command to view current plugin version (permission `siliqonmail.version`)

- restructured a lot of code

- config/lang updaters now working

- other minor changes

Added automatic plugin update checker.