Added/updated options for artron energy costs
Only allow energy transfer if capacitor level is below 10%
Removed todos
Add hashmap to track whether the tardis has travelled and artron energy should be deducted
Deduct energy for comehere and hide, also check they have enough before allowing it
.remove(int) looks for the numeric key, .remove(Integer.valueOf(int)) finds the key with that value
Do float division to get the correct percentage
Whwn comparing distance, make sure the locations are in the same world
Add method to add or remove artron energy
Check they have enough energy before allowing travel
Remove quotes around number when adding new config items
Deduct the artron energy when they exit the TARDIS