Default BiomeGroups Immutable
Default BiomeGroups Immutable.
Use/allow custom mappings for simpler package names.
Closes #43
BiomeGroups with 0 entries should be declared.
Merge branch 'refactor/biomegroup' into dev
SaveName, while defaulting to worldname, can now be configured via SaveConfig.cfg
Closes #32
Configuration importing on world creation can be setup via SaveConfig.cfg
Merge branch 'refactor/worldselect' into dev