Backup plugin exclude filter

[kayila]

It'd be useful if we could specify a filter to exclude from the backup plugin. For example I'd love to be able to exclude mods/* to reduce the size of my world backups on my forge server. Maybe this could/should be part of world configuration as well so it doesn't have to be passed on every call. (And maybe make a new backup flag --create-full which will backup everything ignoring the filter to backup the mods or whatever too.)

[AdorablePotato]

If you're still using the EMSM (I hope so), you can now specify exclude_paths in the configuration. These paths can be specified once for all worlds in the main.conf configuration file or for each world separate in the world's configuration file (.world.conf).

I will upload the new EMSM version to PyPi on the weekend.