Removed some stuff, improved some stuff and moved some stuff.

- Added isInRange Method to TRItemProcessor to replace the old method
available in NoItem
- Limiter permissions now support groups (although I advise not to use
them, as they are alot slower compared to the other single permissions)
- Removed TRConfigItem as it can be replaced with TRItem
- Removed some unused classes
- Fixed typo in the name of TRItemProcessor