Added a basic multi block generator system (regenerate language file)
- added a structure system, now each stage may have a structure or a single block
- added placeholder support to: command, op_command, and console_command
- fixed a bug where reloading wouldn't regenerate missing folders, and files
- added 'generator-overlap' to language file (error message sent when two generators overlap since now you can have multi block generators)
- refactoring