Start implementing part restrictions. WIP
Implement Part Restrictions! \o/
Add old part-restrictions as defaults (will probably be adjusted)
Move configs into a directory in preparation for.. more config files >_<
Move PartRestrictions into its own module with its own configfile
Where shall I even begin... Proper Part-Restricting?
Simplyfied the restricted material handling. We don't really need to access the ID at runtime, we can save the lookup.