Transfer Node Upgrades

Transfer Node Upgrades are special items that can alter how a Transfer Node works. Currently, there are a grand total of 10 upgrades! They are:
 * Breadth-First Search Upgrade
 * Creative Upgrade
 * Depth-First Search Upgrade
 * Ender Receptor
 * Ender Transmitter
 * Item Filter
 * Mining Upgrade
 * Pseudo Round Robin Upgrade
 * Speed Upgrade
 * Stacks Upgrade