Stockpile Priority System

This mod makes it so the configured storage cap of each stockpike and dock now also work as a storage priority. Stockpiles and docks are allowed to collect a certain type of resource from other stockpiles and docks if the former has higher priority for this kind of resource than the later. The priority for storage cap is: 0 - this stockpile does not store this kind of resource. 1~989 - top priority 990 - 2nd priority 991 - 3rd priority ... 999 - lowest priority Examples: Stockpile A - Wood 999 Stockpile B - Wood 998 In this case, B is allowed to collect woods from A, while A is NOT allowed to collect woods from B. Stockpile A - Wood 0 Stockpile B - Wood 998 In this case, B is allowed to collect woods from A (if any present), while workers from A will never collect woods from anywhere. Stockpile A - Wood 999 Stockpile B - Wood 999 In this case, A and B are NOT allowed to collect woods from each other. Stockpile A - Wood 999 Stockpile B - Wood 998 Stockpile C - Wood 50 Stockpile D - Wood 100 In this case, C is allowed to collect woods from both A and B, but only do so until it has 50 woods. The same is true for D, except C and D has same priority and will not grab resources from each other.