Flan-Rental

Added Impactor compatability (/mod/impactor)

Adding this made me redo how we do the rent logic as impactor can use decimal points, this may break a few things but through my testing it has not just yet, I added a check when server starts to check the format so that should catch any issues and fix them before causing any issues. 

Also fixed the create command always showing (spur) by adding a check what mod/currency we're using instead of hardcoding spurs, not even sure why I still had that, sorry